SQL LCASE()  converts the value of a field to lowercase.

Syntaxt

SELECT LCASE(column_name) FROM table_name

Table – Users

+——+
| name |
+——+
| AAAA |
| BBBB |
| CCCC |
| DDDD |
| EEEE |
+——+

Example

mysql> SELECT LCASE(name) FROM users;
+————-+
| LCASE(name) |
+————-+
| aaaa        |
| bbbb        |
| cccc        |
| dddd        |
| eeee        |
+————-+
5 rows in set (0.00 sec)