add
remove
split
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
23ai
23c
26ai
8.4
9.3
9.4
9.5
9.6
10
11
12
13
14
15
16
17
18
19 beta 3
2012
2014
2016
2017
2017 (Linux)
2019
2019 (Linux)
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
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
no sample DB
no sample DB
no sample DB
AdventureWorks
no sample DB
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
abort
markdown
clear
donate
feedback
about
By using db<>fiddle, you agree to license everything you submit by
Creative Commons CC0
.
CREATE TABLE T AS -- 0 0 3 4 5 6 6 7 7 8 11 12 18 22 SELECT 0 AS col2 FROM dual UNION ALL SELECT 0 AS col2 FROM dual UNION ALL SELECT 3 AS col2 FROM dual UNION ALL SELECT 4 AS col2 FROM dual UNION ALL SELECT 5 AS col2 FROM dual UNION ALL SELECT 6 AS col2 FROM dual UNION ALL SELECT 6 AS col2 FROM dual UNION ALL SELECT 7 AS col2 FROM dual UNION ALL SELECT 7 AS col2 FROM dual UNION ALL SELECT 8 AS col2 FROM dual UNION ALL SELECT 11 AS col2 FROM dual UNION ALL SELECT 12 AS col2 FROM dual UNION ALL SELECT 18 AS col2 FROM dual UNION ALL SELECT 22 AS col2 FROM dual;
WITH RECURSIVE cte AS ( SELECT *, ROW_NUMBER() OVER(ORDER BY col2) AS rn FROM T ), rec AS ( SELECT col2, rn, col2 AS first_val, 1 AS grp FROM cte WHERE rn = 1 UNION ALL SELECT c.col2, c.rn, CASE WHEN r.first_val + 7 >= c.col2 THEN r.first_val ELSE c.col2 END, grp + CASE WHEN r.first_val + 7 >= c.col2 THEN 0 ELSE 1 END FROM rec r JOIN cte c ON r.rn = c.rn-1 ) SELECT col2, grp FROM rec ORDER BY col2;
col2
grp
0
1
0
1
3
1
4
1
5
1
6
1
6
1
7
1
7
1
8
2
11
2
12
2
18
3
22
3