本文介绍了SQL UPDATE带有附加字符串CONCAT的字段中的所有值不起作用的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这就是我想做的:
当前表:
+----+-------------+
| id | data |
+----+-------------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+----+-------------+
神秘查询(类似"UPDATE table SET data = CONCAT(data, 'a')"
)
结果表:
+----+-------------+
| id | data |
+----+-------------+
| 1 | maxa |
| 2 | lindaa |
| 3 | sama |
| 4 | henrya |
+----+-------------+
就是这样!我只需要在单个查询中执行此操作,但似乎找不到方法.我在bluehost上使用了mySQL(我认为它的版本是4.1)
thats it! I just need to do it in a single query, but can't seem to find a way. I am using mySQL on bluehost (I think its version 4.1)
谢谢大家.
推荐答案
这几乎是您所需要的:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> select * from t;
+------+--------+
| id | data |
+------+--------+
| 1 | maxa |
| 2 | lindaa |
| 3 | sama |
| 4 | henrya |
+------+--------+
4 rows in set (0.00 sec)
尽管我正在5.1.41上对此进行测试,但不确定为什么会遇到麻烦
Not sure why you'd be having trouble, though I am testing this on 5.1.41
这篇关于SQL UPDATE带有附加字符串CONCAT的字段中的所有值不起作用的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!