oracle 存储过程的基本语法
1.基本结构
CREATE OR REPLACE PROCEDURE 存储过程名字
(
参数1 IN NUMBER,
参数2 IN NUMBER
) IS
变量1 INTEGER :=0;
变量2 DATE;
BEGIN
END 存储过程名字
2.SELECT INTO STATEMENT
将select查询的结果存入到变量中,可以同时将多个列存储多个变量中,必须有一条
记录,否则抛出异常(如果没有记录抛出NO_DATA_FOUND)
例子:
BEGIN
SELECT col1,col2 into 变量1,变量2 FROM typestruct where xxx;
EXCEPTION
WHEN NO_DATA_FOUND THEN
xxxx;
END;
...
3.IF 判断
IF V_TEST=1 THEN
BEGIN
do something
END;
END IF;
4.while 循环
WHILE V_TEST=1 LOOP
BEGIN
XXXX
END;
END LOOP;
5.变量赋值
V_TEST := 123;
6.用for in 使用cursor
...
IS
CURSOR cur IS SELECT * FROM xxx;
BEGIN
FOR cur_result in cur LOOP
BEGIN
V_SUM :=cur_result.列名1+cur_result.列名2
END;
END LOOP;
END;
7.带参数的cursor
CURSOR C_USER(C_ID NUMBER) IS SELECT NAME FROM USER WHERE TYPEID=C_ID;
OPEN C_USER(变量值);
LOOP
FETCH C_USER INTO V_NAME;
EXIT FETCH C_USER%NOTFOUND;
do something
END LOOP;
CLOSE C_USER;
8.用pl/sql developer debug
连接数据库后建立一个Test WINDOW
在窗口输入调用SP的代码,F9开始debug,CTRL+N单步调试
- 存储过程 包含三部分: 声明,执行部分,异常。
- 可以有无参数程序和带参数存储过程。
- 无参程序语法
- 1 create or replace procedure NoParPro
- 2 as ;
- 3 begin
- 4 ;
- 5 exception
- 6 ;
- 7 end;
- 8
-
- 带参存储过程实例
- 1 create or replace procedure queryempname(sfindno emp.empno%type) as
- 2 sName emp.ename%type;
- 3 sjob emp.job%type;
- 4 begin
- 5 ....
- 7 exception
- ....
- 14 end;
- 15
-
- 带参数存储过程含赋值方式
- 1 create or replace procedure runbyparmeters (isal in emp.sal%type,
- sname out varchar,sjob in out varchar)
- 2 as icount number;
- 3 begin
- 4 select count(*) into icount from emp where sal>isal and job=sjob;
- 5 if icount=1 then
- 6 ....
- 9 else
- 10 ....
- 12 end if;
- 13 exception
- 14 when too_many_rows then
- 15 DBMS_OUTPUT.PUT_LINE('返回值多于1行');
- 16 when others then
- 17 DBMS_OUTPUT.PUT_LINE('在RUNBYPARMETERS过程中出错!');
- 18 end;
- 19
-
- 过程调用
- 方式一
- 1 declare
- 2 realsal emp.sal%type;
- 3 realname varchar(40);
- 4 realjob varchar(40);
- 5 begin
- 6 realsal:=1100;
- 7 realname:='';
- 8 realjob:='CLERK';
- 9 runbyparmeters(realsal,realname,realjob); --必须按顺序
- 10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
- 11 END;
- 12
-
- 方式二
- 1 declare
- 2 realsal emp.sal%type;
- 3 realname varchar(40);
- 4 realjob varchar(40);
- 5 begin
- 6 realsal:=1100;
- 7 realname:='';
- 8 realjob:='CLERK';
- 9 runbyparmeters(sname=>realname,isal=>realsal,sjob=>realjob); --指定值对应变量顺序可变
- 10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
- 11 END;
- 12