Question

这是我的PL / SQL功能部分。我试图在select语句中使用该函数。例如，我们可以编写像select count(column_name) from table_name这样的查询。这里count是一个函数。我想使用我自己的这样的功能。我尝试过不同的方法（使用PL / SQL函数之外的函数，在PL / SQL函数中）。但是当在PL / SQL函数内部使用时会抛出错误PLS-00231:function 'GET_ANNUAL_COMP' may not be used in SQL，而在PL / SQL函数之外使用时抛出ORA-00904 invalid identifier。

我正在使用oracle 11g。

declare
em_sal number(20);
em_comm employees.commission_pct%type; 
annual_salary number(10,4);

function get_annual_comp(sal in number, comm in number)
return number is
begin
return (sal*12 + comm*12);
end;
begin
select salary into em_sal from employees where employee_id=149;
select commission_pct into em_comm from employees where employee_id=149;

annual_salary := get_annual_comp(em_sal,em_comm);

dbms_output.put_line('total salary '|| annual_salary);

select get_annual_comp(salary,commission_pct) from employees where department_id=90;
end;
/

Answer 1

在适当的模式（将运行匿名块的sames模式）中编译函数，如下所示：

CREATE OR REPLACE FUNCTION GET_ANNUAL_COMP(
    sal  IN NUMBER,
    comm IN NUMBER)
  RETURN NUMBER
IS
BEGIN
  RETURN (sal*12 + comm*12);
END;

使用与该函数相同的模式，运行匿名块：

DECLARE
  em_sal NUMBER(20);
  em_comm employees.commission_pct%type;
  annual_salary NUMBER(10,4);
BEGIN
  SELECT salary INTO em_sal FROM employees WHERE employee_id=149;
  SELECT commission_pct INTO em_comm FROM employees WHERE employee_id=149;
  annual_salary := get_annual_comp(em_sal,em_comm);
  dbms_output.put_line('total salary '|| annual_salary);
  SELECT SUM(get_annual_comp(salary,commission_pct)) into annual_salary
  FROM employees
  WHERE department_id=90;
  dbms_output.put_line('department annual salary '|| annual_salary);
END;
/

Answer 2

全局创建功能。还要确保在同一模式中创建函数，登录用户也具有模式中的必要特权。

在ORACLE的select语句中调用PL / SQL中的函数

2 个答案: