MySQL query to replace a string after the last / in a column with directory links?

For this, use the substring_index() method. Let us first create a table −

mysql> create table DemoTable    -> (    -> FolderName varchar(100),    -> FolderLocation varchar(200)    -> ); Query OK, 0 rows affected (1.03 sec)

Insert some records in the table using insert command −

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)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

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

Here is the query to replace a string after the last / in a column with directory links −

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

Let us check the table records once again −

mysql> select *from DemoTable;

Output

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