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mysql 如何查询 a 表中所有的 id 并写入 b 表数据
kaiki
·
Dec 22, 2020
· 1030 views
This topic created in 1954 days ago, the information mentioned may be changed or developed.
就写入 id 就行,之后弄个触发器让它新增自动写入好了。
可以的话跳过已存在的 id 数据
写入
触发器
MySQL
数据
2 replies
1
kaiki
OP
Dec 22, 2020
算了,想起来了
insert into b(m_id) select id from a where id not in(select id from b);
2
kaiki
OP
Dec 22, 2020
@
kaiki
打错了
insert into b(id) select id from a where id not in(select id from b);
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