MySQL 查询用目录链接替换列中最后一个 / 后面的字符串?
mysqlmysqli database更新于 2025/9/14 5:00:17
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) -> ); Query OK, 0 rows affected (1.03 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('CProgram','C:/AllPrograms/.....');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values('Images','E:/MyImage/home/garbage');
Query OK, 1 row affected (0.15 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+------------+-------------------------+ | FolderName | FolderLocation | +------------+-------------------------+ | CProgram | C:/AllPrograms/..... | | Images | E:/MyImage/home/garbage | +------------+-------------------------+ 2 rows in set (0.00 sec)
以下查询用于用目录链接替换列中最后一个 / 后面的字符串 −
mysql> UPDATE DemoTable SET FolderLocation = CONCAT(LEFT(FolderLocation , CHAR_LENGTH(FolderLocation ) - CHAR_LENGTH(SUBSTRING_INDEX(FolderLocation , '/', -1))),FolderName); Query OK, 2 rows affected (0.16 sec) Rows matched: 2 Changed: 2 Warnings: 0
让我们再次检查表记录 −
mysql> select *from DemoTable;
输出
+------------+-------------------------+ | FolderName | FolderLocation | +------------+-------------------------+ | CProgram | C:/AllPrograms/CProgram | | Images | E:/MyImage/home/Images | +------------+-------------------------+ 2 rows in set (0.00 sec)
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mysql 参考教程 - 该教程包含有关 mysql 的更多信息:https://www.cainiaomax.com/mysql/
