如
[sql]
select exitsts (select * from absence)
select not exists (select * from absence)
如
[sql]
select j from t
與主查詢相關的子查詢的工作情況是
From:http://tw.wingwit.com/Article/program/MySQL/201311/29303.html
如
[sql]
select exitsts (select * from absence)
select not exists (select * from absence)
如
[sql]
select j from t
與主查詢相關的子查詢的工作情況是