add
remove
language
chart
show hidden
hide
db<>fiddle
Db2
DocumentDB
DuckDB
Firebird
MariaDB
MySQL
Oracle
Postgres
SQL Server
SQLite
TimescaleDB
YugabyteDB
11.1
11.5
12.1
0.114 (MongoDB 7.0)
0.116 (MongoDB 7.0)
1.4 LTS
3.0
4.0
5.0
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.11
11.4
11.8
12.3
5.5
5.6
5.7
8.0
8.4
9.7
11g Release 2
18c
21c
23c
23ai
26ai
8.4
9.3
9.4
9.5
9.6
10
11
12
13
14
15
16
17
18
19 beta 4
2012
2014
2016
2017 (Linux)
2017
2019 (Linux)
2019
2022
2025
3.8
3.16
3.27
3.39
3.45
3.53
2.11
2.14
2.28
2.6
2.8
2.18
2024.2 LTS
2025.2 LTS
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
Sakila
no sample DB
Sakila
no sample DB
Sakila
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
HR
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
db<>fiddle Statistics
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
AdventureWorks
no sample DB
AdventureWorks
no sample DB
AdventureWorks
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
no sample DB
run with 2025
abort
markdown
clear
donate
feedback
about
By using db<>fiddle, you agree to license everything you submit by
Creative Commons CC0
.
CREATE TABLE mytable( Name VARCHAR(6) NOT NULL ,Start_Date DATE NOT NULL ,End_Date DATE NOT NULL ); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Johnny','2020-01-02','2020-01-04'); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Johnny','2020-01-05','2020-01-05'); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Johnny','2020-01-06','2020-01-10'); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Jenny','2020-02-07','2020-02-07'); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Jenny','2020-02-10','2020-02-11'); INSERT INTO mytable(Name,Start_Date,End_Date) VALUES ('Jenny','2020-02-12','2020-02-12');
6 rows affected
select name, max(consecutive_days) consecutive_days from ( select name, datediff(day, min(start_date), max(end_date)) + 1 consecutive_days from ( select t.*, sum(case when start_date = dateadd(day, 1, lag_end_date) then 0 else 1 end) over(partition by name order by start_date) grp from ( select t.*, lag(end_date) over(partition by name order by start_date) lag_end_date from mytable t ) t ) t group by name, grp ) t group by name
name
consecutive_days
Jenny
3
Johnny
9