TRIM FUNCTIONS
Returns the string str with all remstr prefixes or suffixes removed.
Syntax
TRIM(expr);
LTRIM(expr);
RTRIM(expr);
Examples
SELECT TRIM('   aaa   ');
+-------------------+
| trim('   aaa   ') |
+-------------------+
| aaa               |
+-------------------+
SELECT LTRIM('   aaa   ');
+--------------------+
| LTRIM('   aaa   ') |
+--------------------+
| aaa                |
+--------------------+
SELECT RTRIM('   aaa   ');
+--------------------+
| RTRIM('   aaa   ') |
+--------------------+
|    aaa             |
+--------------------+