MySQL Stored Procedure to update records with certain condition?

For this, you can use the UPDATE command along with the WHERE clause in a PROCEDURE. Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Id int,
   -> FirstName varchar(20),
   -> LastName varchar(20)
   -> );
Query OK, 0 rows affected (0.56 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(101,'David','Brown');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values(102,'Chris','Brown');
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable values(103,'John','Doe');
Query OK, 1 row affected (0.07 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+------+-----------+----------+
| Id   | FirstName | LastName |
+------+-----------+----------+
|  101 | David     | Brown    |
|  102 | Chris     | Brown    |
|  103 | John      | Doe      |
+------+-----------+----------+
3 rows in set (0.00 sec)

Here is the query to create a stored procedure−

mysql> delimiter //
mysql> create procedure update_sp(fName varchar(20),lName varchar(20))
   -> begin
   -> update DemoTable
   -> set FirstName=fName,
   -> LastName=lName
   -> where Id=101;
   -> end
   -> //
Query OK, 0 rows affected (0.12 sec)
mysql> delimiter ;

Now you can call a stored procedure using call command −

mysql> call update_sp('Adam','Smith');
Query OK, 1 row affected, 2 warnings (0.08 sec)

Let us check the table records once again −

mysql> select *from DemoTable;

This will produce the following output −

+------+-----------+----------+
| Id   | FirstName | LastName |
+------+-----------+----------+
|  101 | Adam      | Smith    |
|  102 | Chris     | Brown    |
|  103 | John      | Doe      |
+------+-----------+----------+
3 rows in set (0.00 sec)