• 場景一

delete from table1 where id = (select max(id) from table1 ); [Err] 1093 - You can’t specify target table 'table1 ’ for update in FROM clause

描述: 如果子查詢的 from 子句和更新、刪除物件使用同一張表，會出現上述錯誤。 解決方法: 通過給 from 子句中的結果集起別名。

delete from table1 where id = (select n.max_id from (select max(id) as max_id from table1 ) as n);

上述情況對於 in 子句也適用，in後面的子查詢不能帶where條件，帶where條件的必須使用別名

delete from table1 where id in (select id from table1 where id > 30); [Err] 1093 - You can’t specify target table 'table1 ’ for update in FROM clause

解決方法同上:

delete from table1 where id in (select n.id from (select id from table1 where id > 30) as n);

• 場景二

delete from table1 m where m.id = 1; [Err] 1064 - You have an error in your SQL syntax;

描述: delete from table 這樣的句子中 table 不能使用別名。 解決方法：去掉別名:

delete from table1 where id = 1;