How can I create a stored procedure to update values in a MySQL table?

We can create a stored procedure with IN operator to update values in 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    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Jaipur     | Literature |
| 110  | Rahul   | Chandigarh | History    |
| 125  | Raman   | Bangalore  | Computers  |
+------+---------+------------+------------+
4 rows in set (0.01 sec)

Now, by creating the procedure named ‘update_studentinfo’ as follow, we can update the values in ‘student_info’ table −

mysql> DELIMITER // ;
mysql> Create Procedure Update_studentinfo ( IN p_id INT, IN p_address varchar(20))
   -> BEGIN
   -> UPDATE student_info
   -> SET
   -> address = p_address WHERE id = p_id;
   -> END //
Query OK, 0 rows affected (0.13 sec)

Now, invoke the procedure with the values we want to update in the table as follows −

mysql> Delimiter ; //
mysql> CALL Update_studentinfo(125, 'Shimla');
Query OK, 1 row affected (0.14 sec)

mysql> Select * from student_info;
+------+---------+------------+------------+
| id   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Jaipur     | Literature |
| 110  | Rahul   | Chandigarh | History    |
| 125  | Raman   | Shimla     | Computers  |
+------+---------+------------+------------+
4 rows in set (0.00 sec)

The above result set shows that the address of record having id = 125 updated in the table.

Prabhas

Published on 21-Feb-2018 08:05:19

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