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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.
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