Oracle存储过程语法

1.基本结构

CREATE OR REPLACE PROCEDURE 存储过程名字 --名字可加双引号也可不加

(

参数1 IN NUMBER,

参数2 IN VARCHAR2

) IS

变量1 INTEGER :=0;--内部变量声明及赋值

变量2 DATE;

BEGIN

END 存储过程名字

--或者

END;

/

//oracle公司推荐使用VARCHAR2，不使用VARCHAR

//存储过程传入参数的in可省略，默认就是in

//没有bool类型，用int代替

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 tbl where xxx;

EXCEPTION

WHEN NO_DATA_FOUND THEN

xxxx;

END;

...



DECLARE sname VARCHAR2(20) :='jerry';

SELECT ename INTO sname FROM tbl WHERE empno=1;



3.IF 判断

if (p2=1) then

dbms_output.put_line('111');

elsif p2=2 then

dbms_output.put_line('222');

else

dbms_output.put_line('else');

end if;

--如果输出的行太长

v_pos:=1;

WHILE v_pos<= LENGTH(SqlStr) LOOP

DBMS_OUTPUT.PUT_LINE(SUBSTR(SqlStr, v_pos, 200));

v_pos:= v_pos+ 200;

END LOOP;



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

declare

cursor cc is select * from tbl order by id;

ccrec cc%rowtype;

begin

for ccrec in cc loop

begin

dbms_output.put_line(ccrec.ID||'-'||ccrec.Name);

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

本篇文章来源于 PHP资讯 原文链接：http://www.phpq.net/oracle/oracle-stored-procedure-syntax.html

9.CASE 语句

CASE selector

WHEN value1 THEN action1;

WHEN value2 THEN action2;

WHEN value3 THEN action3;

…..

ELSE actionN;

END CASE;

CASE表达式

DECLARE

temp VARCHAR2(10);

v_num number;

BEGIN

v_num := &i;

temp := CASE v_num

WHEN 0 THEN 'Zero'

WHEN 1 THEN 'One'

WHEN 2 THEN 'Two'

ELSE

NULL

END;

dbms_output.put_line('v_num = '||temp);

END;

/

CASE搜索语句

CASE

WHEN (boolean_condition1) THEN action1;

WHEN (boolean_condition2) THEN action2;

WHEN (boolean_condition3) THEN action3;

……

ELSE actionN;

END CASE;

CASE搜索表达式

DECLARE

a number := 20;

b number := -40;

tmp varchar2(50);

BEGIN

tmp := CASE

WHEN (a>b) THEN 'A is greater than B'

WHEN (a<b) THEN 'A is less than B'

ELSE

'A is equal to B'

END;

dbms_output.put_line(tmp);

END;

/



或者用输出的方式调试

set serveroutput on;

declare

a varchar2(20);

begin

select 用户名||密码 into a from login where rownum<2;

dbms_output.put_line(a);

end;

/