A表(tb_abc):
| A | B | |
| 1 | aa | 0200 |
| 2 | bb | 0300 |
| 3 | cc | 0500 |
| 4 | dd | 1800 |
| 5 | ee | 2200 |
| 6 | ff | 3300 |
B表(tb_abcc):
| A | B | |
| 1 | aa | (0201) |
| 2 | aa | (0202) |
| 3 | bb | (0301) |
| 4 | bb | (0302) |
| 5 | bb | (0303) |
| 6 | cc | (0501) |
括号里是预期值
规则: 通过B表的a字段匹配A表的a字段,并读取A表的b字段,按照该值依次增数写入B表b字段
实现:
update
tb_abcc c
set
c.b =
(select
tmp.str
from
(select
b.rowid rd,
b.a,
substr(a.b, 1, 2) || lpad(
(
rank () over (partition by b.a
order by b.rowid)
),
2,
0
) str
from
tb_abc a,
tb_abcc b
where a.a = b.a) tmp
where c.rowid = tmp.rd)
where exists
(select
'x'
from
(select
b.rowid rd,
b.a,
substr(a.b, 1, 2) || lpad(
(
rank () over (partition by b.a
order by b.rowid)
),
2,
0
) str
from
tb_abc a,
tb_abcc b
where a.a = b.a) tmp
where c.rowid = tmp.rd);6 rows updated
select * from tb_abcc;A B
---- ------
aa 0201
aa 0202
bb 0301
bb 0302
bb 0303
cc 0501
6 rows selected
