php mysql更新限制

Question

我想更新 mysql 数据库，其中 directory = 0，并且只更新 5 条记录，其中值 0 为 art 。

解释:

id    |   directory
1     |   fashion
2     |   0    //update here into 'art'
3     |   travel
4     |   fashion
5     |   0    //update here into 'art'
6     |   0    //update here into 'art'
7     |   travel
8     |   0    //update here into 'art'
9     |   0    //update here into 'art'
10    |   0    //this is 6th record, do not update, leave the value as '0'.
11    |   fashion

这个更新码对吗？谢谢。

mysql_query("UPDATE articles SET directory = 'art' WHERE directory ='0' LIMIT 5");

Answer 1

你的syntax很好。

我将添加一个 order by 子句(确定)

ORDER BY `Id`

查询

UPDATE articles SET directory = 'art' WHERE directory ='0' ORDER BY id LIMIT 5