oracle 函数、包的定义及使用

方法定义：

CREATE OR REPLACE 

function insert_emp 

(v_EMPNO NUMBER,v_ENAME VARCHAR2,v_JOB VARCHAR2,v_MGR NUMBER,v_HIREDATE DATE,v_SAL NUMBER,v_COMM NUMBER,v_DEPTNO NUMBER)

return NUMBER

IS

BEGIN

INSERT into EMP values(v_empno,v_ENAME,v_JOB,v_MGR,v_HIREDATE,v_SAL,v_COMM,v_DEPTNO);

return 1;

end insert_emp;

创建存储过程调用方法：

create or replace PROCEDURE function_test(

v_EMPNO NUMBER,

v_ENAME VARCHAR2,

v_JOB VARCHAR2,

v_MGR NUMBER,

v_HIREDATE DATE,

v_SAL NUMBER,

v_COMM NUMBER,

v_DEPTNO NUMBER,

v_out out number)

AS

BEGIN

v_out:= insert_emp(v_EMPNO,v_ENAME,v_JOB,v_MGR,v_HIREDATE,v_SAL,v_COMM,v_DEPTNO);

end;

调用存储过程：

DECLARE

p_out number;

BEGIN

 function_test('7347', 'Kitty', 'CLERK', '7902', TO_DATE('1980-12-17 00:00:00', 'YYYY-MM-DD HH24:MI:SS'), '800', null, '20',p_out);

end;

包：

1、定义

create or replace package my_1

is

PROCEDURE sayhello(vname varchar2);

end;

2、实现包体

CREATE or replace package body my_1

is

PROCEDURE sayhello(vname varchar2)

IS

BEGIN

dbms_output.putline('hello'||vname);

end;

end;

3、创建存储过程调用

create or replace PROCEDURE package_test(p1 string)

AS

BEGIN

my_1.sayhello(p1);

end;

BEGIN

package_test('a');

end;

Sequence

CREATE sequence num

INCREMENT BY 1

START WITH 1

nomaxvalue

nocycle

cache 10;

主要有num.nextval,num.currval属性

游标：

DECLARE

 cursor result is SELECT * from STUDENT for UPDATE ;

 resultInfo STUDENT%rowtype;

 i_Status STUDENT.status%type;

BEGIN

 for resultInfo IN result loop

  if resultInfo.MAJOR1SCORE >60 AND resultInfo.MAJOR2SCORE >60

    and resultInfo.MAJOR3SCORE >60 AND resultInfo.totalScore >400 THEN      

   UPDATE STUDENT set STATUS= '1' WHERE current OF result;

   dbms_output.put_line(resultInfo.sid||'-'||resultInfo.sname||'-已录取');

 ELSE

   UPDATE STUDENT set STATUS= '0' WHERE current OF result;

   dbms_output.put_line(resultInfo.sid||'-'||resultInfo.sname||'-未录取');

 end if;

 end loop;

END;