如何在MySQL列中替换特定的字符?
要替换特定字符,请使用REPLACE()函数,并使用UPDATE命令进行更新。我们首先创建一个表 –
mysql> create table DemoTable1899
(
Code varchar(20)
);
Query OK, 0 rows affected (0.00 sec)
使用插入命令在表中插入一些记录 –
mysql> insert into DemoTable1899 values('John_123');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1899 values('32189_Sam_987');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1899 values('Miller_David_456_909');
Query OK, 1 row affected (0.00 sec)
使用SELECT语句显示表中的所有记录 –
mysql> select * from DemoTable1899;
这将产生以下输出 –
+----------------------+
| Code |
+----------------------+
| John_123 |
| 32189_Sam_987 |
| Miller_David_456_909 |
+----------------------+
3 rows in set (0.00 sec)
下面是替换特定字符的查询 –
mysql> update DemoTable1899 set Code=replace(Code,'_','');
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
让我们再次检查表中的记录:
mysql> select * from DemoTable1899;
这将产生以下输出 –
+-------------------+
| Code |
+-------------------+
| John123 |
| 32189Sam987 |
| MillerDavid456909 |
+-------------------+
3 rows in set (0.00 sec)
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