1
MeteorCat 2020-10-23 18:47:39 +08:00 via Android
我记得 inner join 加上 if 可以实现
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2
kx5d62Jn1J9MjoXP 2020-10-23 18:51:49 +08:00 via Android
union ?
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3
kx5d62Jn1J9MjoXP 2020-10-23 18:53:40 +08:00 via Android
select id, num, '' pwd from t1 where id =1
union select id, '' num, pwd from t2 where id =1 |