oracle存储过程
--基本语法
create or replace procedure hello
as
begin
dbms_output.put_line('hello word');
end;
--执行
1.--sqlplus命令
execute
exec
2.begin .... end;
3.call--sql命令
exec hello();
call hello();
--带参数存储过程
create or replace procedure money(eid in number)
as
oldmoney pro_test.money%type;--引用变量
begin
select t.money into oldmoney from pro_test t where t.id=eid;
update pro_test t set t.money=t.money+100 where t.id=eid;
dbms_output.put_line(oldmoney);
end;
call money(3);
--存储函数
create or replace function querymoney(eid in number)
return number
as
oldmoney pro_test.money%type;
oldname pro_test.name%type;
begin
select t.name,t.money into oldname,oldmoney from pro_test t where t.id=eid;
return nvl(oldmoney,0)*12;
end;
--out参数
create or replace procedure queryone(eid in number,
ename out varchar2,
emoney out number)
as
begin
select t.name,t.money into ename,emoney from pro_test t where t.id=eid;
end;
--包头
create or replace package mypackage
as
--声明游标
type mycursor is ref cursor;
--定义存储过程
procedure queryList(eid in number,eList out mycursor);
end mypackage;
--包体
create or replace package body mypackage
as
procedure queryList(eid in number,eList out mycursor)
as
begin
open eList for select * from pro_test;
end queryList;
end mypackage;
--返回结果集
create or replace procedure testList(eList out sys_refcursor)
as
begin
open eList for select * from pro_test;
end;
--,综合
create or replace procedure cursorTest(eList out sys_refcursor)
as
inta number;
CURSOR cur_1 IS
select * from pro_test;
CURSOR cur_2 is
select * from pro_test;
cur_3 SYS_REFCURSOR;
popo varchar2(100);
begin
FOR rec IN cur_1 LOOP
DBMS_OUTPUT.put_line(rec.name);
end loop;
inta:=2;
DBMS_OUTPUT.put_line(inta);
if inta>2 then
begin
inta:=inta*10;
end;
elsif inta<=2 then
begin
inta:=inta*50;
end;
else
begin
DBMS_OUTPUT.put_line('判断结束');
end;
end if;
DBMS_OUTPUT.put_line(inta);
while inta<10000 loop
inta:=inta+100;
end loop;
DBMS_OUTPUT.put_line(inta);
if popo is null then
DBMS_OUTPUT.put_line('popo is null');
end if;
if popo<>null then
DBMS_OUTPUT.put_line('popo <> null');
end if;
end cursorTest;
-----------------------------------------------------------------------
实例
下面写一个简单的例子来对以上所说的存储过程的用法做一个应用：
现假设存在两张表，一张是学生成绩表(studnet) ，字段为：stdId,math,article,language,music,sport,total,average,step
一张是学生课外成绩表(out_school), 字段为:stdId,parctice,comment
通过存储过程自动计算出每位学生的总成绩和平均成绩，同时，如果学生在课外课程中获得的评价为A ，就在总成绩上加20 分。
create or replace procedure autocomputer(step in number) is
rsCursor SYS_REFCURSOR;
commentArray myPackage.myArray;
math number;
article number;
language number;
music number;
sport number;
total number;
average number;
stdId varchar(30);
record myPackage.stdInfo;
i number;
begin
i := 1;
get_comment(commentArray); -- 调用名为get_comment() 的存储过程获取学生课外评分信息
OPEN rsCursor for select stdId,math,article,language,music,sport from student t where t.step = step;
LOOP
fetch rsCursor into stdId,math,article,language,music,sport; exit when rsCursor%NOTFOUND;
total := math + article + language + music + sport;
for i in 1..commentArray.count LOOP
record := commentArray(i);
if stdId = record.stdId then
begin
if record.comment = 'A' then
begin
total := total + 20;
go to next; -- 使用go to 跳出for 循环
end;
end if;
end;
end if;
end LOOP;
<<continue>> average := total / 5;
update student t set t.total=total and t.average = average where t.stdId = stdId;
end LOOP;
end;
end autocomputer;
-- 取得学生评论信息的存储过程
create or replace procedure get_comment(commentArray out myPackage.myArray) is
rs SYS_REFCURSOR ；
record myPackage.stdInfo;
stdId varchar(30);
comment varchar(1);
i number;
begin
open rs for select stdId,comment from out_school
i := 1;
LOOP
fetch rs into stdId,comment; exit when rs%NOTFOUND;
record.stdId := stdId;
record.comment := comment;
recommentArray(i) := record;
i:=i + 1;
end LOOP;
end get_comment;
-- 定义数组类型myArray
create or replace package myPackage is begin
type stdInfo is record(stdId varchar(30),comment varchar(1));
type myArray is table of stdInfo index by binary_integer;
end myPackage;
JDBC调用存储过程
CallableStatement cs = conn.prepareCall("{call all_user()}");
cs.setInt(1, 3);
cs.registerOutParameter(2, Types.CHAR);
cs.execute();
String name =cs.getString(2);
hibernate调用存储过程
HibernateSessionFactory.getSession().createSQLQuery("{Call proc()}"); Listlist=query.list();
session.connection(); CallableStatement cs = conn.prepareCall("{call all_user()}");
jpa调用存储过程
entityManager.createNativeQuery
注解@NamedStoredProcedureQueries
//假如我要获取一个User的集合，这个存储过程名字是GetUserList()
Queryquery=em.createNativeQuery("{callGetUserList()}",User.class);
List<User>result=query.getResultList();
//result就是你要的全部user
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