Use case statement in procedure call to use the proper parameter value : CASE « PL SQL Statements « Oracle PL/SQL Tutorial

SQL> DECLARE
  2    salary NUMBER := 20000;
  3    employee_id NUMBER := 36325;
  4
  5    PROCEDURE give_bonus (emp_id IN NUMBER, bonus_amt IN NUMBER) IS
  6    BEGIN
  7      DBMS_OUTPUT.PUT_LINE(emp_id);
  8      DBMS_OUTPUT.PUT_LINE(bonus_amt);
  9    END;
 10
 11  BEGIN
 12     give_bonus(employee_id,
 13                CASE
 14                WHEN salary >= 10000 AND salary <=20000 THEN 1500
 15                WHEN salary > 20000 AND salary <= 40000 THEN 1000
 16                WHEN salary > 40000 THEN 500
 17                ELSE 0
 18                END);
 19  END;
 20  /

PL/SQL procedure successfully completed.

SQL>
SQL>

22.2.CASE
	22.2.1.	CASE statements
	22.2.2.	When creating selector CASE statements, you cannot have NULL in the list of possible values.
	22.2.3.	Use CASE statement
	22.2.4.	Named case block
	22.2.5.	case when
	22.2.6.	An example of comparison of two numbers using a searched CASE expression
	22.2.7.	Variable assignment with case statement
	22.2.8.	Use case statement in a dbms_output.put_line
	22.2.9.	Simple CASE statement with range
	22.2.10.	Case statement to call procedure
	22.2.11.	Return statement with case
	22.2.12.	Use case statement in procedure call to use the proper parameter value