DB2 Stored Procedure Best Example

Stored procedures can be written in COBOL, PL/1, REXX and Java etc. Db2 stored procedures are handled by WLM -work Load Manager. Main uses are reusability and security.

Stored Procedure Flow

Note: The language to write stored procedure can be SQL, COBOL, PL/1 and JAVA. It runs in the database (in our case DB2). It needs an input and it gives you output after running it.

DB2 Stored Procedure Example

CREATE PROCEDURE UPDATE_SALARY (IN EMPLOYEE_NUM CHAR(6), IN RATE1 DECIMAL(5,2))
LANGUAGE SQL
WLM ENVIRONMENT SAMP1
COMMIT ON RETURN YES
IF RATE1 <= 0.7
THEN UPDATE EMP
SET SALARY = SALARY * RATE1
WHERE EMPNO= EMPLOYEE_NUM;
ELSE  UPDATE EMP
SET SALARY = SALARY * 0.7
WHERE EMPNO = EMPLOYEE_NUM;
END IF

Here you passed three arguments to Stored Procedure IN- Input, OUT-Output INOUT-Input and output.