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MySQL查询用目录链接替换最后一个/列中的字符串？

2024-05-10 10:12:17 353

为此，请使用substring_index()方法。让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> FolderName varchar(100),
   -> FolderLocation varchar(200)
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values('CProgram','C:/AllPrograms/.....');

mysql> insert into DemoTable values('Images','E:/MyImage/home/garbage');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+------------+-------------------------+
| FolderName | FolderLocation          |
+------------+-------------------------+
| CProgram   | C:/AllPrograms/.....    |
| Images     | E:/MyImage/home/garbage |
+------------+-------------------------+
2 rows in set (0.00 sec)

这是用目录链接替换列中最后一个/后面的字符串的查询-

mysql> UPDATE DemoTable SET FolderLocation = CONCAT(LEFT(FolderLocation , CHAR_LENGTH(FolderLocation ) - CHAR_LENGTH(SUBSTRING_INDEX(FolderLocation , '/', -1))),FolderName);
Rows matched: 2  Changed: 2 Warnings: 0

让我们再次检查表记录-

mysql> select *from DemoTable;

输出结果

+------------+-------------------------+
| FolderName | FolderLocation          |
+------------+-------------------------+
| CProgram   | C:/AllPrograms/CProgram |
| Images     | E:/MyImage/home/Images  |
+------------+-------------------------+
2 rows in set (0.00 sec)

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MySQL查询用目录链接替换最后一个/列中的字符串？

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