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当我添加列时，这个查询给了我一个错误key，有什么帮助吗？

username并且product是复合主键，以防万一。

mysql> select * from sw_product_session where username='admin';
+----------+----------+------------+----------------------------+
| username | product  | expire     | key                        |
+----------+----------+------------+----------------------------+
| admin    | printbox | 1373550885 | 2ijm77cpnfc7miktasopkik2q2 |
+----------+----------+------------+----------------------------+
1 row in set (0.00 sec)

mysql> select * from sw_product_session where username='admin' AND product='printbox';
+----------+----------+------------+----------------------------+
| username | product  | expire     | key                        |
+----------+----------+------------+----------------------------+
| admin    | printbox | 1373550885 | 2ijm77cpnfc7miktasopkik2q2 |
+----------+----------+------------+----------------------------+
1 row in set (0.00 sec)

mysql> select * from sw_product_session where username='admin' AND product='printbox' AND key='2ijm77cpnfc7miktasopkik2q2';
ERROR 1064 (42000): 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 'key='2ijm77cpnfc7miktasopkik2q2'' at line 1
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1 回答 1

8

您需要记住，任何保留字都需要转义：

AND `key`='...'
于 2013-07-11T14:01:12.777 回答