SQL UCASE()  converts the value of a field to uppercase.

Syntaxt

SELECT UCASE(column_name) FROM table_name

Table – Users

+—–+——+
| uid | name |
+—–+——+
|   1 | aaaa |
|   2 | bbbb |
|   3 | cccc |
|   4 | dddd |
|   5 | eeee |
+—–+——+

Example

mysql> SELECT UCASE(name) AS name  FROM users;
+——+
| name |
+——+
| AAAA |
| BBBB |
| CCCC |
| DDDD |
| EEEE |
+——+
5 rows in set (0.00 sec)