What is the purpose of MySQL TRIM() function?

MySQL TRIM() function is used to remove the specific suffix or prefix or both from the string. The working of TRIM() function can be understood with the help of its syntax −

Syntax

TRIM([{BOTH | LEADING | TRAILING} [str_to_remove] FROM] string)

Here, 

• the argument BOTH means the prefixes from both left and right to be removed from the string.
• LEADING argument means that only leading prefixes to be removed.
• TRAILING argument means that only trailing prefixes to be removed.
• Str_to_remove is the argument which means the string we want to remove from the string.
• String argument means the string from which the prefixes have to be removed.

Example

mysql> Select TRIM(BOTH '0' FROM '0100');
+----------------------------+
| TRIM(BOTH '0' FROM '0100') |
+----------------------------+
| 1                          |
+----------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(BOTH '**' from '**tutorialspoint.com**');
+------------------------------------------------+
| TRIM(BOTH '**' from '**tutorialspoint.com**')  |
+------------------------------------------------+
| tutorialspoint.com                             |
+------------------------------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(Trailing '**' from '**tutorialspoint.com**');
+----------------------------------------------------+
| TRIM(Trailing '**' from '**tutorialspoint.com**')  |
+----------------------------------------------------+
| **tutorialspoint.com                               |
+----------------------------------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(Leading '**' from '**tutorialspoint.com**');
+---------------------------------------------------+
| TRIM(Leading '**' from '**tutorialspoint.com**')  |
+---------------------------------------------------+
| tutorialspoint.com**                              |
+---------------------------------------------------+
1 row in set (0.00 sec)