1.连表更新
准备两张表,id一样,但是姓名不一样, 需求根据id让姓名保持一致
执行的sql
UPDATE teacher_copy1 AS b
INNER JOIN teacher c ON b.TId = c.TId
set b.tname=c.tname
执行结果
2.连接删除
DELETE a
FROMteacher_copy1 AS aINNER JOIN teacher b ON a.TId = b.TId
1.连表更新
准备两张表,id一样,但是姓名不一样, 需求根据id让姓名保持一致
执行的sql
UPDATE teacher_copy1 AS b
INNER JOIN teacher c ON b.TId = c.TId
set b.tname=c.tname
执行结果
2.连接删除
DELETE a
FROMteacher_copy1 AS aINNER JOIN teacher b ON a.TId = b.TId
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