MySQL在字段中查找/替换字符串?
要在字段中查找/替换字符串,语法如下-
update yourTableNameset yourColumnName =REPLACE(yourColumnName,yourOldValue,yourNewValue);
为了理解上述语法,让我们创建一个表。创建表的查询如下-
mysql> create table FindReplaceDemo-> (
-> FileId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> FileDirectory text
-> );
现在,您可以使用insert命令在表中插入一些记录。查询如下-
mysql> insert into FindReplaceDemo(FileDirectory) values('C://User//MySQL');mysql> insert into FindReplaceDemo(FileDirectory) values('D://WebsiteImage//image1.jpg');
mysql> insert into FindReplaceDemo(FileDirectory) values('E://Java//AdvancedJava');
使用select语句显示表中的所有记录。查询如下-
mysql> select *from FindReplaceDemo;
这是输出-
+--------+------------------------------+| FileId | FileDirectory |
+--------+------------------------------+
| 1 | C://User//MySQL |
| 2 | D://WebsiteImage//image1.jpg |
| 3 | E://Java//AdvancedJava |
+--------+------------------------------+
3 rows in set (0.00 sec)
这是在字段中查找/替换字符串的查询-
mysql> update FindReplaceDemo-> set FileDirectory =REPLACE(FileDirectory,'E://Java//AdvancedJava','E://Java//SpringAndHibernateFramework');
Rows matched: 3 Changed: 1 Warnings: 0
现在,让我们再次检查表记录。查询如下-
mysql> select *from FindReplaceDemo;
输出如下,并带有替换值-
+--------+---------------------------------------+| FileId | FileDirectory |
+--------+---------------------------------------+
| 1 | C://User//MySQL |
| 2 | D://WebsiteImage//image1.jpg |
| 3 | E://Java//SpringAndHibernateFramework |
+--------+---------------------------------------+
3 rows in set (0.00 sec)
以上是 MySQL在字段中查找/替换字符串? 的全部内容, 来源链接: utcz.com/z/358750.html