MySQL automatic conversion on lowercase? Is this possible?

George John

Answered on 13th Jun, 2019

Yes, it is possible with triggers. You can create trigger for automatic conversion on lower case. Let us first create a table −

mysql> create table DemoTable
   (
   StudentSubject text
   );
Query OK, 0 rows affected (0.61 sec)

Let us create a trigger for automatic conversion on lower case −

mysql> CREATE TRIGGER lowerCaseOnInsertDemo BEFORE INSERT ON DemoTable FOR EACH ROW
   SET NEW.StudentSubject = LOWER(NEW.StudentSubject);
Query OK, 0 rows affected (0.21 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('MOngoDb');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable values('JaVA');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable values('MySqL');
Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output displaying the converted lowercase values −

+----------------+
| StudentSubject |
+----------------+
| mongodb        |
| java           |
| mysql          |
+----------------+
3 rows in set (0.00 sec)