oracle 常用存储过程

普通存储过程，无任何参数
CREATE OR REPLACE PROCEDURE EMP_COUNT  
AS  
V_TOTAL NUMBER(10);  
BEGIN  
 SELECT COUNT(*) INTO V_TOTAL FROM EMP;  
 DBMS_OUTPUT.PUT_LINE('雇员总人数为：'||V_TOTAL);  
END;  

--带参数存储过程，无输出参数
CREATE OR REPLACE PROCEDURE CHANGE_SALARY(P_EMPNO IN NUMBER DEFAULT 7788,P_RAISE NUMBER DEFAULT 10)  
        AS  
         V_ENAME VARCHAR2(10);  
V_SAL NUMBER(5);  
        BEGIN  
        SELECT ENAME,SAL INTO V_ENAME,V_SAL FROM EMP WHERE EMPNO=P_EMPNO;  
         UPDATE EMP SET SAL=SAL+P_RAISE WHERE EMPNO=P_EMPNO;  
         DBMS_OUTPUT.PUT_LINE('雇员'||V_ENAME||'的工资被改为'||TO_CHAR(V_SAL+P_RAISE));  
COMMIT;  
        EXCEPTION  
         WHEN OTHERS THEN  
        DBMS_OUTPUT.PUT_LINE('发生错误，修改失败！');  
        ROLLBACK;  
        END;  

--带输出参数的存储过程
CREATE OR REPLACE PROCEDURE EMP_COUNT(P_TOTAL OUT NUMBER)  
        AS  
        BEGIN  
        SELECT COUNT(*) INTO P_TOTAL FROM EMP;  
        END;