Question

此查询

UPDATE `sites_configuration` SET `configuration_value`= `value` 
WHERE `configuration_id` = 41 AND `sites_id` = 2 LIMIT 0, 30

给我这个错误

#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 ' 30' at line 1

它指的是什么语法错误？我尝试使用分号或将语句包装在引号中，但它不起作用。

Answer 1

LIMIT 0,30在更新查询中没有意义。试试LIMIT 30。

Answer 2

正如您在mysql documentation中所看到的，您只能在限制中提供行数而不是偏移量。

UPDATE [LOW_PRIORITY] [IGNORE] tbl_name
    SET col_name1=expr1 [, col_name2=expr2 ...]
    [WHERE where_condition]
    [ORDER BY ...]
    [LIMIT row_count]

让您查询

UPDATE `sites_configuration` SET `configuration_value`= `value` 
WHERE `configuration_id` = 41 AND `sites_id` = 2 LIMIT 30

Answer 3

您无法通过更新其无效

来指定限制偏移

错误：限制0,10

但您可以指定为

update table set val = 'something' limit 30

这是一个演示

mysql> select * from test ;
+------------+--------+--------+
| Date       | Person | Action |
+------------+--------+--------+
| 2014-01-01 | John   | Enter  |
| 2014-01-01 | lilly  | Enter  |
| 2014-01-01 | bill   | Enter  |
| 2014-01-01 | bill   | Enter  |
| 2014-01-02 | bill   | Enter  |
| 2014-01-02 | lilly  | Enter  |
| 2014-01-02 | bill   | Enter  |
| 2014-01-02 | John   | Enter  |
| 2014-01-02 | John   | Enter  |
+------------+--------+--------+
9 rows in set (0.02 sec)


mysql> update test set Action = 'GO' limit 0,5;
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 '5' at line 1

mysql> update test set Action = 'GO' limit 5;
Query OK, 5 rows affected (0.00 sec)
Rows matched: 5  Changed: 5  Warnings: 0

mysql> select * from test ;
+------------+--------+--------+
| Date       | Person | Action |
+------------+--------+--------+
| 2014-01-01 | John   | GO     |
| 2014-01-01 | lilly  | GO     |
| 2014-01-01 | bill   | GO     |
| 2014-01-01 | bill   | GO     |
| 2014-01-02 | bill   | GO     |
| 2014-01-02 | lilly  | Enter  |
| 2014-01-02 | bill   | Enter  |
| 2014-01-02 | John   | Enter  |
| 2014-01-02 | John   | Enter  |
+------------+--------+--------+

在phpmyadmin中这个查询可能有什么问题？

3 个答案: