SQL Server 2022

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CREATE TABLE SalesLedger (Id int PRIMARY KEY IDENTITY, Date date NOT NULL, Total decimal(38,18), INDEX IX (Date, Total));
CREATE TABLE Purchases (Id int PRIMARY KEY IDENTITY, Date date NOT NULL, Total decimal(38,18), INDEX IX (Date, Total));
CREATE VIEW ViewMetrics
AS

Select
  Date,
  'Sale' as Metric,
  Total as Value
From SalesLedger

UNION ALL

Select
  Date,
  'Purchase' as Metric,
  Total as Value
From Purchases;
SET STATISTICS XML ON;

Select SUM(Value) as Sales, Date
from ViewMetrics
Group By Date;

SELECT SUM(Sales), Date
FROM (
  Select SUM(Value) as Sales, Date
  from ViewMetrics
  Group By Metric, Date
) t
GROUP BY Date;

Select SUM(Value) as Sales, Date
from ViewMetrics
where Metric = 'Sale'
Group By Date;

Sales
Date

Microsoft SQL Server 2005 XML Showplan

<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="Select SUM(Value) as Sales, Date&#xa;from ViewMetrics&#xa;Group By Date" StatementId="1" StatementCompId="2" StatementType="SELECT" StatementSqlHandle="0x0900B92A33A2977E29D43335E774CE34EAC30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0121705" StatementEstRows="1.5" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x5AFA3E235439405F" QueryPlanHash="0xBCA44B1CD2BFA7D9" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="24" CompileTime="15" CompileCPU="0" CompileMemory="328"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1389512"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1.5" EstimateIO="0" EstimateCPU="0" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121705" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1009"></ColumnReference><ScalarOperator ScalarString="CASE WHEN [Expr1014]=(0) THEN NULL ELSE [Expr1015] END"><IF><Condition><ScalarOperator><Compare CompareOp="EQ"><ScalarOperator><Identifier><ColumnReference Column="Expr1014"></ColumnReference></Identifier></ScalarOperator><ScalarOperator><Const ConstValue="(0)"></Const></ScalarOperator></Compare></ScalarOperator></Condition><Then><ScalarOperator><Const ConstValue="NULL"></Const></ScalarOperator></Then><Else><ScalarOperator><Identifier><ColumnReference Column="Expr1015"></ColumnReference></Identifier></ScalarOperator></Else></IF></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1.5" EstimateIO="0" EstimateCPU="1.95e-06" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121705" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1014"></ColumnReference><ColumnReference Column="Expr1015"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues><DefinedValue><ColumnReference Column="Expr1014"></ColumnReference><ScalarOperator ScalarString="COUNT_BIG([Union1008])"><Aggregate Distinct="0" AggType="COUNT_BIG"><ScalarOperator><Identifier><ColumnReference Column="Union1008"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue><DefinedValue><ColumnReference Column="Expr1015"></ColumnReference><ScalarOperator ScalarString="SUM([Union1008])"><Aggregate Distinct="0" AggType="SUM"><ScalarOperator><Identifier><ColumnReference Column="Union1008"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue></DefinedValues><GroupBy><ColumnReference Column="Union1006"></ColumnReference></GroupBy><RelOp NodeId="2" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="2" EstimateIO="0" EstimateCPU="0.0056023" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121685" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Union1008"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Column="Union1008"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="3" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Index="[IX]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Index="[IX]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></ComputeScalar></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>

(No column name)
Date

Microsoft SQL Server 2005 XML Showplan

<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT SUM(Sales), Date&#xa;FROM (&#xa;  Select SUM(Value) as Sales, Date&#xa;  from ViewMetrics&#xa;  Group By Metric, Date&#xa;) t&#xa;GROUP BY Date" StatementId="2" StatementCompId="3" StatementType="SELECT" StatementSqlHandle="0x090078C607A660E542B7B75061F77CBFC2C10000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0121727" StatementEstRows="1.5" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0xE858FAA683CDBA75" QueryPlanHash="0x9839C6EF432234C6" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="0" CompileCPU="0" CompileMemory="632"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1389512"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1.5" EstimateIO="0" EstimateCPU="0" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121727" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1010"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1010"></ColumnReference><ScalarOperator ScalarString="CASE WHEN [Expr1031]=(0) THEN NULL ELSE [Expr1032] END"><IF><Condition><ScalarOperator><Compare CompareOp="EQ"><ScalarOperator><Identifier><ColumnReference Column="Expr1031"></ColumnReference></Identifier></ScalarOperator><ScalarOperator><Const ConstValue="(0)"></Const></ScalarOperator></Compare></ScalarOperator></Condition><Then><ScalarOperator><Const ConstValue="NULL"></Const></ScalarOperator></Then><Else><ScalarOperator><Identifier><ColumnReference Column="Expr1032"></ColumnReference></Identifier></ScalarOperator></Else></IF></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1.5" EstimateIO="0" EstimateCPU="1.95e-06" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121727" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1031"></ColumnReference><ColumnReference Column="Expr1032"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues><DefinedValue><ColumnReference Column="Expr1031"></ColumnReference><ScalarOperator ScalarString="COUNT_BIG([Expr1009])"><Aggregate Distinct="0" AggType="COUNT_BIG"><ScalarOperator><Identifier><ColumnReference Column="Expr1009"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue><DefinedValue><ColumnReference Column="Expr1032"></ColumnReference><ScalarOperator ScalarString="SUM([Expr1009])"><Aggregate Distinct="0" AggType="SUM"><ScalarOperator><Identifier><ColumnReference Column="Expr1009"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue></DefinedValues><GroupBy><ColumnReference Column="Union1006"></ColumnReference></GroupBy><RelOp NodeId="2" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="2" EstimateIO="0" EstimateCPU="0.0056023" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0121707" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Column="Expr1009"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="3" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="0" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032842" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1009"></ColumnReference><ScalarOperator ScalarString="CASE WHEN [Expr1027]=(0) THEN NULL ELSE [Expr1028] END"><IF><Condition><ScalarOperator><Compare CompareOp="EQ"><ScalarOperator><Identifier><ColumnReference Column="Expr1027"></ColumnReference></Identifier></ScalarOperator><ScalarOperator><Const ConstValue="(0)"></Const></ScalarOperator></Compare></ScalarOperator></Condition><Then><ScalarOperator><Const ConstValue="NULL"></Const></ScalarOperator></Then><Else><ScalarOperator><Identifier><ColumnReference Column="Expr1028"></ColumnReference></Identifier></ScalarOperator></Else></IF></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateIO="0" EstimateCPU="1.1e-06" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032842" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Column="Expr1027"></ColumnReference><ColumnReference Column="Expr1028"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues><DefinedValue><ColumnReference Column="Expr1027"></ColumnReference><ScalarOperator ScalarString="COUNT_BIG([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[SalesLedger].[Total])"><Aggregate Distinct="0" AggType="COUNT_BIG"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue><DefinedValue><ColumnReference Column="Expr1028"></ColumnReference><ScalarOperator ScalarString="SUM([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[SalesLedger].[Total])"><Aggregate Distinct="0" AggType="SUM"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue></DefinedValues><GroupBy><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference></GroupBy><RelOp NodeId="5" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Index="[IX]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></StreamAggregate></RelOp></ComputeScalar></RelOp><RelOp NodeId="6" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="0" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032842" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1009"></ColumnReference><ScalarOperator ScalarString="CASE WHEN [Expr1029]=(0) THEN NULL ELSE [Expr1030] END"><IF><Condition><ScalarOperator><Compare CompareOp="EQ"><ScalarOperator><Identifier><ColumnReference Column="Expr1029"></ColumnReference></Identifier></ScalarOperator><ScalarOperator><Const ConstValue="(0)"></Const></ScalarOperator></Compare></ScalarOperator></Condition><Then><ScalarOperator><Const ConstValue="NULL"></Const></ScalarOperator></Then><Else><ScalarOperator><Identifier><ColumnReference Column="Expr1030"></ColumnReference></Identifier></ScalarOperator></Else></IF></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="7" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateIO="0" EstimateCPU="1.1e-06" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032842" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference><ColumnReference Column="Expr1029"></ColumnReference><ColumnReference Column="Expr1030"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues><DefinedValue><ColumnReference Column="Expr1029"></ColumnReference><ScalarOperator ScalarString="COUNT_BIG([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[Purchases].[Total])"><Aggregate Distinct="0" AggType="COUNT_BIG"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue><DefinedValue><ColumnReference Column="Expr1030"></ColumnReference><ScalarOperator ScalarString="SUM([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[Purchases].[Total])"><Aggregate Distinct="0" AggType="SUM"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue></DefinedValues><GroupBy><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference></GroupBy><RelOp NodeId="8" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[Purchases]" Index="[IX]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></StreamAggregate></RelOp></ComputeScalar></RelOp></Merge></RelOp></StreamAggregate></RelOp></ComputeScalar></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>

Sales
Date

Microsoft SQL Server 2005 XML Showplan

<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="Select SUM(Value) as Sales, Date&#xa;from ViewMetrics&#xa;where Metric = &apos;Sale&apos;&#xa;Group By Date" StatementId="3" StatementCompId="4" StatementType="SELECT" StatementSqlHandle="0x09002F1D36AF05459FF0EEF614C9B38E1ADB0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.00328478" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x50D3B004014848ED" QueryPlanHash="0x9FFD8B01AC91CB4D" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="328"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1389512"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="0" AvgRowSize="27" EstimatedTotalSubtreeCost="0.00328478" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1009"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1009"></ColumnReference><ScalarOperator ScalarString="CASE WHEN [Expr1014]=(0) THEN NULL ELSE [Expr1015] END"><IF><Condition><ScalarOperator><Compare CompareOp="EQ"><ScalarOperator><Identifier><ColumnReference Column="Expr1014"></ColumnReference></Identifier></ScalarOperator><ScalarOperator><Const ConstValue="(0)"></Const></ScalarOperator></Compare></ScalarOperator></Condition><Then><ScalarOperator><Const ConstValue="NULL"></Const></ScalarOperator></Then><Else><ScalarOperator><Identifier><ColumnReference Column="Expr1015"></ColumnReference></Identifier></ScalarOperator></Else></IF></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateIO="0" EstimateCPU="1.1e-06" AvgRowSize="27" EstimatedTotalSubtreeCost="0.00328478" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1006"></ColumnReference><ColumnReference Column="Expr1014"></ColumnReference><ColumnReference Column="Expr1015"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues><DefinedValue><ColumnReference Column="Expr1014"></ColumnReference><ScalarOperator ScalarString="COUNT_BIG([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[SalesLedger].[Total])"><Aggregate Distinct="0" AggType="COUNT_BIG"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue><DefinedValue><ColumnReference Column="Expr1015"></ColumnReference><ScalarOperator ScalarString="SUM([fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[SalesLedger].[Total])"><Aggregate Distinct="0" AggType="SUM"><ScalarOperator><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></Identifier></ScalarOperator></Aggregate></ScalarOperator></DefinedValue></DefinedValues><GroupBy><ColumnReference Column="Union1006"></ColumnReference></GroupBy><RelOp NodeId="2" PhysicalOp="Filter" LogicalOp="Filter" EstimateRows="1" EstimateIO="0" EstimateCPU="4.8e-07" AvgRowSize="30" EstimatedTotalSubtreeCost="0.00328368" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference><ColumnReference Column="Union1006"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualRebinds="1" ActualRewinds="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Filter StartupExpression="1"><RelOp NodeId="3" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="1e-07" AvgRowSize="30" EstimatedTotalSubtreeCost="0.0032832" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference><ColumnReference Column="Union1006"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Union1006"></ColumnReference><ScalarOperator ScalarString="[fiddle_29bdf5153857478eb0161ebbccb5d04d].[dbo].[SalesLedger].[Date]"><Identifier><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="27" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Date"></ColumnReference></DefinedValue><DefinedValue><ColumnReference Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Column="Total"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_29bdf5153857478eb0161ebbccb5d04d]" Schema="[dbo]" Table="[SalesLedger]" Index="[IX]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></ComputeScalar></RelOp><Predicate><ScalarOperator ScalarString="&apos;Sale&apos;=&apos;Sale&apos;"><Compare CompareOp="EQ"><ScalarOperator><Const ConstValue="&apos;Sale&apos;"></Const></ScalarOperator><ScalarOperator><Const ConstValue="&apos;Sale&apos;"></Const></ScalarOperator></Compare></ScalarOperator></Predicate></Filter></RelOp></StreamAggregate></RelOp></ComputeScalar></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>