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存储过程和存储函数和触发器示例

2024-07-10 09:53:35   214人阅读

1、存储过程示例：为指定的职工在原工资的基础上长10%的工资

SQL> create or replace procedure raiseSalary(empid in number)     as     pSal emp.sal%type;     begin     select sal into pSal from emp where empno=empid;     update emp set sal = sal*1.1 where empno=empid;     dbms_output.put_line(‘员工号:‘ || empid || ‘涨工资前     ‘ || psal || ‘涨工资后‘ || psal*1.1);     end;    / Procedure created SQL> set serveroutput on SQL> exec raisesalary(7369);

员工号:7369涨工资前

 

800涨工资后880

 

PL/SQL procedure successfully completed

 

2、存储函数示例：查询某职工的年收入。

SQL> /**   查询某职工的总收入 　　*/

create or replace function queryEmpSalary(empid in number)     return number     as     pSal number; --定义变量保存员工的工资     pComm number; --定义变量保存员工的奖金    begin    select sal,comm into psal,pcomm from emp where empno = empid;    return psal*12+nvl(pcomm,0);    end;    / Function created SQL> declare     v_sal number;     begin     v_sal:=queryEmpSalary(7934);     dbms_output.put_line(‘salary is:‘|| v_sal);     end;     / salary is:15600 PL/SQL procedure successfully completed SQL> begin     dbms_output.put_line(‘salary is:‘|| queryEmpSalary(7934));     end;     / salary is:15600 PL/SQL procedure successfully completed

 

3、创建触发器示例1：限制非工作时间向数据库插入数据

SQL> create or replace     trigger securityEmp     before insert on emp     declare     begin     if to_char(sysdate,‘day‘)in(‘星期四‘,‘星期六‘,‘星期日‘)     or to_number(to_char(sysdate,‘hh24‘))not between 8 and 18 then      raise_application_error(-20001,‘不能在非工作时间插入数据。‘);     end if;    end;    / Trigger created

 

4、创建触发器示例2：确认数据（检查emp表中sal 的修改值不低于原值）

SQL> create or replace trigger checkSal     before update of sal on emp     for each row     declare     begin     if :new.sal<:old.sal then     raise_application_error(-20001,‘更新后的薪水比更新前小‘);     end if;     end;    / Trigger created

 

 


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