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Developer-C 11.1
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DECLARE @T TABLE (DT DATETIME PRIMARY KEY) INSERT @T values ('2024-08-07 00:14:11.363') --Returns 0 rows as expected from above SELECT * FROM @T WHERE DT = CAST('2024-08-07 00:14:11.3630000' AS datetime2(7)) --Returns 0 rows - unexpected SELECT * FROM @T WHERE DT = CAST('2024-08-07 00:14:11.3633333' AS datetime2(7)) --Returns 1 rows so explicit cast to datetime2 helps SELECT * FROM @T WHERE CAST(DT AS datetime2(7)) = CAST('2024-08-07 00:14:11.3633333' AS datetime2(7)) --Returns 1 rows - not sure why casting the column to the datatype it already has helps! SELECT * FROM @T WHERE CAST(DT AS datetime) = CAST('2024-08-07 00:14:11.3633333' AS datetime2(7))
DT
DT
DT
2024-08-07 00:14:11.363
DT
2024-08-07 00:14:11.363