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MySQL stored procedure to return a column value?
Let us first create a table −
mysql> create table DemoTable -> ( -> Id int, -> Score int -> ); Query OK, 0 rows affected (0.69 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(1,858858686); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(2,9900554); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(3,646565667); Query OK, 1 row affected (0.15 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+------+-----------+ | Id | Score | +------+-----------+ | 1 | 858858686 | | 2 | 9900554 | | 3 | 646565667 | +------+-----------+ 3 rows in set (0.00 sec)
Following is the MySQL stored procedure −
mysql> DELIMITER // mysql> CREATE PROCEDURE Test_StoredProcedure(in id INT, OUT scoreValue INT) -> BEGIN -> SELECT Score -> INTO scoreValue -> FROM DemoTable tbl -> WHERE tbl.Id = id; -> END -> // Query OK, 0 rows affected (0.18 sec) mysql> DELIMITER ;
Now, call the stored procedure with the help of call command and store the output into a variable name called ‘@result’ −
mysql> call Test_StoredProcedure(2,@result); Query OK, 1 row affected (0.00 sec)
Now display the variable value using select statement −
mysql> select @result;
Output
This will produce the following output −
+---------+ | @result | +---------+ | 9900554 | +---------+ 1 row in set (0.00 sec)
Updated on: 30-Jun-2020
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