mysql - 这个 MySQL 查询有什么问题？

Question

DELETE
  LIB, REL
FROM
  test_library_song LIB
INNER JOIN
  test_relation REL
ON
  LIB.book_id = REL.book_id
WHERE
  REL.user_id = '1'
AND
  REL.book_id = '400'
LIMIT 1

它抛出一个错误:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 1' at line 13

如果我删除 LIMIT 1，它会起作用，但我希望它处于安全状态。

Answer 1

在我看来，LIMIT 仅对单表删除有效

http://dev.mysql.com/doc/refman/5.0/en/delete.html

For the multiple-table syntax, DELETE deletes from each tbl_name the rows that satisfy the conditions. In this case, ORDER BY and LIMIT cannot be used.