Oracle Stored Functions

a definition

Function is an unnamed stored procedure that can take parameters and return a computed value.

Functions and procedures are similar in structure, but must have a return clause that returns the function value.

 

two grammar

ccreate[or replace] FUNCTION function name (parameter list)

return function value type

AS

PLSQL subroutine body;

 

Three needs

Query the annual income of an employee

 

four code

1. create or replace function queryempincoming(eno in number)
2. return number
3. as
4. --定义一个变量保存员工的的薪水和奖金
5. psal emp.sal%type;
6. pcomm emp.comm%type;
7. begin
8. select sal,comm into psal,pcomm from emp where empno=eno;
9. --直接返回年收入
10. return psal*12+nvl(pcomm,0);
11. end;

 

Five call stored procedures

Select the function, right-click and select "Run". Enter an employee number. Run, output the employee number.

v_Return = 43500