Working with WHERE IN() in a MySQL Stored Procedure

Let us first create a table −

mysql> create table DemoTable    -> (    -> Id int,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.69 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(100,'Chris'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(101,'Bob'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(102,'David'); Query OK, 1 row affected (0.18 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable;

This will produce the following output −

+------+-------+ | Id   | Name  | +------+-------+ |  100 | Chris | |  101 | Bob   | |  102 | David | +------+-------+ 3 rows in set (0.00 sec)

Here is the query to create a stored procedure to use WHERE IN() −

mysql> DELIMITER // mysql> CREATE PROCEDURE whereInDemo(in input varchar(100))    -> BEGIN    -> set @Query = 'select Name from DemoTable ';    -> set @Query = CONCAT(@Query,' where Id IN (',`input`,')');    -> prepare stmt from @Query;    -> execute stmt;    -> deallocate prepare stmt;    -> END // Query OK, 0 rows affected (0.23 sec) mysql> DELIMITER ;

Now you can call stored procedure using CALL command −

mysql> call whereInDemo('100,102');

This will produce the following output −

+-------+ | Name  | +-------+ | Chris | | David | +-------+ 2 rows in set (0.04 sec) Query OK, 0 rows affected, 1 warning (0.07 sec)