Identity rows by groups
Identity rows by groups. start from 1 to N and repeat for each group.
Last updated:
Warning: Review and test in a non-production environment before running.
select * from order_group;
1 ffasfasdfasd
2 ffasfasdfasd
3 ffasfasdfasd
4 ffasfasdfasd
5 ffasfasdfasd
6 ffasfasdfasd
7 ffasfasdfasd
8 ffasfasdfasd
9 ffasfasdfasd
10 ffasfasdfasd
11 ffasfasdfasd
12 ffasfasdfasd
13 ffasfasdfasd
14 ffasfasdfasd
15 ffasfasdfasd
16 ffasfasdfasd
select ID%8 new_id,id,name from order_group;
1 1 ffasfasdfasd
2 2 ffasfasdfasd
3 3 ffasfasdfasd
4 4 ffasfasdfasd
5 5 ffasfasdfasd
6 6 ffasfasdfasd
7 7 ffasfasdfasd
0 8 ffasfasdfasd
1 9 ffasfasdfasd
2 10 ffasfasdfasd
3 11 ffasfasdfasd
4 12 ffasfasdfasd
5 13 ffasfasdfasd
6 14 ffasfasdfasd
7 15 ffasfasdfasd
0 16 ffasfasdfasd
update order_group set new_id=8 where new_id=0;