oracle 存儲過程參數介紹 in ,out , in out 以及 執行(二)
阿新 • • 發佈:2017-07-07
pre upd class under cati 查詢 ace proc oracl
存儲過程參數
1.IN DEFAULT (默認)
2.OUT
3.IN OUT 可修改
形參和實參
-- 形參
1 CREATE PROCEDURE raise_sal(ID NUMBER ,sal NUMBER) 2 IS 3 BEGIN ... 4 END raise_sal;
-- 實參
1 emp_id := 100; 2 raise_sal(emp_id,2000);
-- in參數類型演示 薪水漲幅 percent
1 CREATE OR REPLACE PROCEDURE raise_salary 2 ( 3 ID IN employees.employee_id%TYPE , 4 PERCENT IN NUMBER 5 ) 6 IS 7 BEGIN 8 UPDATE employees SET salary = salary * (1 + PERCENT/100) WHERE employee_id = ID; 9 END raise_salary; 10
-- 結果驗證
1 SELECT * FROM employees WHERE employee_id = 206; 2 -- PL/SQL中執行 3 BEGIN 4 raise_salary(206,10); 5 END; 6 EXECUTE raise_salary(206,10); --SQL命令行執行
-- out參數類型演示 查詢指定員工的名字和薪水
1 CREATE OR REPLACE PROCEDURE query_emp 2 ( 3 ID IN employees.employee_id%TYPE, 4 NAME OUT employees.last_name%TYPE, 5 salary OUT employees.salary%TYPE 6 ) 7 IS 8 BEGIN 9 SELECT last_name,salary INTO NAME,salary FROM employees WHERE employee_id =ID; 10 END;
--結果演示
1 -- 在命令行執行 2 SET serveroutput ON; 3 4 DECLARE 5 emp_name employees.last_name%TYPE; 6 emp_sal employees.salary%TYPE; 7 BEGIN 8 query_emp(206,emp_name,emp_sal); 9 dbms_output.put_line(‘name :‘ || emp_name ); 10 dbms_output.put_line(‘salary :‘ || emp_sal ); 11 END; 12 13 -- 命令行執行(二) 14 VARIABLE NAME VARCHAR2(25) 15 VARIABLE sal NUMBER 16 EXECUTE query_emp(206,:NAME,:sal);
-- in out 類型參數
-- 參數傳輸方式
1.位置傳輸
2.名字傳輸 NAME=>VALUE
3.混合方式(1,2)
1 CREATE OR REPLACE PROCEDURE add_dept 2 ( 3 NAME IN departments.department_name%TYPE, 4 loc IN departments.location_id%TYPE 5 ) 6 IS 7 BEGIN 8 INSERT INTO departments (department_id,department_name,location_id) 9 VALUES 10 (departments_seq.nextval,NAME,loc); 11 COMMIT; 12 END add_dept;
--結果驗證
1 --執行 2 EXECUTE add_dept(‘training‘,2500); 3 --驗證 4 SELECT * FROM departments WHERE location_id= 2500; 5 --執行方式二 6 EXECUTE add_dept(loc=>2400,NAME=>‘education‘); 7 --驗證 8 SELECT * FROM departments WHERE location_id= 2400;
-- 使用默認值定義
-- NAME departments.department_name%TYPE = ‘UNKNOW‘,
-- loc departments.location_id%TYPE = 1800
1 CREATE OR REPLACE PROCEDURE add_dept 2 ( 3 NAME departments.department_name%TYPE := ‘UNKNOW‘, 4 loc departments.location_id%TYPE := 1800 5 ) 6 IS 7 BEGIN 8 INSERT INTO departments (department_id,department_name,location_id) 9 VALUES 10 (departments_seq.nextval,NAME,loc); 11 COMMIT; 12 END add_dept;
-- 結果演示
1 --執行 2 EXECUTE add_dept(); 3 --驗證 4 SELECT * FROM departments WHERE location_id= 1800;
oracle 存儲過程參數介紹 in ,out , in out 以及 執行(二)