mysql> select *from add_member;
+-----------+-------------+--------------+-------------------+
| member_ID | member_name | member_phone | member_department |
+-----------+-------------+--------------+-------------------+
| 12345 | kishore | 89482934 | IT738 |
| 12347 | ram | 783892389 | IT721829 |
| 12346 | vardhan | 902112 | TI5738 |
mysql> select *from ownbook;
+--------+----------+-----------+-------------+------------+-----------
| BookID | Bookname | member_ID | member_name | from | to |
+--------+----------+-----------+-------------+------------+------------+
| 1006 | physics | 12346 | ram | 2016-07-05 | 2016-07-20 |
+--------+----------+-----------+-------------+------------+------------+
1 row in set (0.00 sec)
答案 0 :(得分:1)
您可以尝试这样:
delete from add_member where member_ID not exists(select member_ID from ownbook)
或者你可以像使用NOT IN一样使用
delete from add_member where member_ID not in(select member_ID from ownbook)
如果是特定数据,那么只需:
delete from add_member
where member_ID not in(select member_ID from ownbook where member_id in(12345,12347))
答案 1 :(得分:0)
如果您想要删除一个特定的ID,当且仅当它不在第二个表中时,那么您可以这样做:
delete from add_member where member_ID='SEPCIFIC_ID_YOU_WANT' and member_ID not in(select member_ID from ownbook)
100%经过测试。