How can I create a stored procedure to delete values from a MySQL table?

MySQLMySQLi Database

We can create a stored procedure with IN operator to delete values from a MySQL table. To make it understand we are taking an example of a table named ‘student_info’ having the following data −

mysql> Select * from student_info;
+------+---------+------------+------------+
| id   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 100  | Aarav   | Delhi      | Computers  |
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Jaipur     | Literature |
| 110  | Rahul   | Chandigarh | History    |
+------+---------+------------+------------+
4 rows in set (0.00 sec)

Now, by creating the procedure named ‘delete_studentinfo’ as follow, we can delete the values from ‘student_info’ table −

mysql> DELIMITER // ;
mysql> Create Procedure Delete_studentinfo ( IN p_id INT)
    -> BEGIN
    -> DELETE FROM student_info
    -> WHERE ID=p_id;
    -> END //
Query OK, 0 rows affected (0.11 sec)

mysql> DELIMITER ; //

Now, invoke the procedure with the values we want to delete from the table as follows −

mysql> CALL Delete_studentinfo(100);
Query OK, 1 row affected (1.09 sec)

mysql> Select * from student_info;
+------+---------+------------+------------+
| id   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Jaipur     | Literature |
| 110  | Rahul   | Chandigarh | History    |
| 125  | Raman   | Bangalore  | Computers  |
+------+---------+------------+------------+
4 rows in set (0.01 sec)

The above result set shows that the record having id = 100 deleted from the table.

raja
Published on 21-Feb-2018 12:34:42
Advertisements