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MySQL在字段中查找/替换字符串？

2024-04-27 16:32:04 354

要在字段中查找/替换字符串，语法如下-

update yourTableName
set 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)

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MySQL在字段中查找/替换字符串？

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