轉自OTN網,beckham發表 返回记录集过程: CREATE OR REPLACE PACKAGE pkg_test AS TYPE myrctype IS REF CURSOR; PROCEDURE get (p_id NUMBER, p_rc OUT myrctype); END pkg_test; /CREATE OR REPLACE PACKAGE BODY pkg_test AS PROCEDURE get (p_id NUMBER, p_rc OUT myrctype) IS sqlstr VARCHAR2 (500); BEGIN IF p_id = 0 THEN OPEN p_rc FOR SELECT ID, NAME, sex, address, postcode, birthday FROM student; ELSE sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id'; OPEN p_rc FOR sqlstr USING p_id; END IF; END get; END pkg_test; / -------------------------------------------------------------------------------------------------------------- 返回记录集函数: 1、建立测试表 CREATE TABLE student ( id NUMBER, name VARCHAR2(30), sex VARCHAR2(10), address VARCHAR2(100), postcode VARCHAR2(10), birthday DATE, photo LONG RAW ); /2、建立带ref cursor定义的包和包体及函数: CREATE OR REPLACE package pkg_test as /* 定义ref cursor类型 不加return类型,为弱类型,允许动态sql查询, 否则为强类型,无法使用动态sql查询; */ type myrctype is ref cursor; --函数申明 function get(intID number) return myrctype; end pkg_test; /CREATE OR REPLACE package body pkg_test as --函数体 function get(intID number) return myrctype is rc myrctype; --定义ref cursor变量 sqlstr varchar2(500); begin if intID=0 then --静态测试,直接用select语句直接返回结果 open rc for select id,name,sex,address,postcode,birthday from student; else --动态sql赋值,用:w_id来申明该变量从外部获得 sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id'; --动态测试,用sqlstr字符串返回结果,用using关键词传递参数 open rc for sqlstr using intid; end if; return rc; end get;end pkg_test; /3、用pl/sql块进行测试: declare w_rc pkg_test.myrctype; --定义ref cursor型变量 --定义临时变量,用于显示结果 w_id student.id%type; w_name student.name%type; w_sex student.sex%type; w_address student.address%type; w_postcode student.postcode%type; w_birthday student.birthday%type;begin --调用函数,获得记录集 w_rc := pkg_test.get(1); --fetch结果并显示 loop fetch w_rc into w_id,w_name,w_sex,w_address,w_postcode,w_birthday; exit when w_rc%notfound; dbms_output.put_line(w_name); end loop; end;4、测试结果: 通过。 -------------------------------------------------------------------------------------------------------------- 返回对象类型: SQL> create table a (id number,name varchar2(50),doctime date);Table created.--插入六条测试数据: SQL> insert into a values (1,'aaa',to_date('2002-07-01','yyyy-mm-dd'));1 row created.SQL> insert into a values (2,'bbb',to_date('2002-07-02','yyyy-mm-dd'));1 row created.SQL> insert into a values (3,'ccc',to_date('2002-07-03','yyyy-mm-dd'));1 row created.SQL> insert into a values (4,'ddd',to_date('2002-07-04','yyyy-mm-dd'));1 row created.SQL> insert into a values (5,'eee',to_date('2002-07-05','yyyy-mm-dd'));1 row created.SQL> insert into a values (6,'fff',to_date('2002-07-06','yyyy-mm-dd'));1 row created.SQL> commit;Commit complete.--创建两个type SQL> create or replace type myobjectype as object (x int,y date,z varchar2(50)); 2 /Type created.SQL> create or replace type mytabletype as table of myobjectype 2 /Type created.
-------------你要的 for c in (select.............) loop
end loop; -------------- loop
exit when i; end loop; ------------- i := tttt.first; while i is not null loop
i := tttt.next(i); end loop; ------------- open cur_1; loop fetch cur_1 into recVar; exit when cur_1%notfound;
end loop; close cur_1;------------- for i in 1..10 loop
end loop; ------------------- while true loop
end loop;
for c in (select userid from tbl_userinfo) loop dbms_output.put_line(c.userid); end loop;
--open c_cursor for select USERNAME,USERPWD FROM TEST6.TEST_2;--查询 FOR V_Record_Userlist in (select USERNAME,USERPWD FROM TEST6.TEST_2) loop---使用游标,这句话出错!!! DBMS_OUTPUT.PUT_LINE(V_Record_Userlist.USERNAME||V_Record_Userlist.USERPWD);--打印 END LOOP;
返回记录集过程:
CREATE OR REPLACE PACKAGE pkg_test
AS
TYPE myrctype IS REF CURSOR; PROCEDURE get (p_id NUMBER, p_rc OUT myrctype);
END pkg_test;
/CREATE OR REPLACE PACKAGE BODY pkg_test
AS
PROCEDURE get (p_id NUMBER, p_rc OUT myrctype)
IS
sqlstr VARCHAR2 (500);
BEGIN
IF p_id = 0 THEN
OPEN p_rc FOR
SELECT ID, NAME, sex, address, postcode, birthday
FROM student;
ELSE
sqlstr :=
'select id,name,sex,address,postcode,birthday
from student where id=:w_id';
OPEN p_rc FOR sqlstr USING p_id;
END IF;
END get;
END pkg_test;
/
--------------------------------------------------------------------------------------------------------------
返回记录集函数:
1、建立测试表
CREATE TABLE student
(
id NUMBER,
name VARCHAR2(30),
sex VARCHAR2(10),
address VARCHAR2(100),
postcode VARCHAR2(10),
birthday DATE,
photo LONG RAW
);
/2、建立带ref cursor定义的包和包体及函数:
CREATE OR REPLACE
package pkg_test as
/* 定义ref cursor类型
不加return类型,为弱类型,允许动态sql查询,
否则为强类型,无法使用动态sql查询;
*/
type myrctype is ref cursor; --函数申明
function get(intID number) return myrctype;
end pkg_test;
/CREATE OR REPLACE
package body pkg_test as
--函数体
function get(intID number) return myrctype is
rc myrctype; --定义ref cursor变量
sqlstr varchar2(500);
begin
if intID=0 then
--静态测试,直接用select语句直接返回结果
open rc for select id,name,sex,address,postcode,birthday from student;
else
--动态sql赋值,用:w_id来申明该变量从外部获得
sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id';
--动态测试,用sqlstr字符串返回结果,用using关键词传递参数
open rc for sqlstr using intid;
end if; return rc;
end get;end pkg_test;
/3、用pl/sql块进行测试:
declare
w_rc pkg_test.myrctype; --定义ref cursor型变量 --定义临时变量,用于显示结果
w_id student.id%type;
w_name student.name%type;
w_sex student.sex%type;
w_address student.address%type;
w_postcode student.postcode%type;
w_birthday student.birthday%type;begin
--调用函数,获得记录集
w_rc := pkg_test.get(1); --fetch结果并显示
loop
fetch w_rc into w_id,w_name,w_sex,w_address,w_postcode,w_birthday;
exit when w_rc%notfound;
dbms_output.put_line(w_name);
end loop;
end;4、测试结果:
通过。
--------------------------------------------------------------------------------------------------------------
返回对象类型:
SQL> create table a (id number,name varchar2(50),doctime date);Table created.--插入六条测试数据:
SQL> insert into a values (1,'aaa',to_date('2002-07-01','yyyy-mm-dd'));1 row created.SQL> insert into a values (2,'bbb',to_date('2002-07-02','yyyy-mm-dd'));1 row created.SQL> insert into a values (3,'ccc',to_date('2002-07-03','yyyy-mm-dd'));1 row created.SQL> insert into a values (4,'ddd',to_date('2002-07-04','yyyy-mm-dd'));1 row created.SQL> insert into a values (5,'eee',to_date('2002-07-05','yyyy-mm-dd'));1 row created.SQL> insert into a values (6,'fff',to_date('2002-07-06','yyyy-mm-dd'));1 row created.SQL> commit;Commit complete.--创建两个type
SQL> create or replace type myobjectype as object (x int,y date,z varchar2(50));
2 /Type created.SQL> create or replace type mytabletype as table of myobjectype
2 /Type created.
其实我就是要练习使用FOR语句
如果我要在上面的语句中一定要用FOR语句应该如何做呢?
for c in (select.............)
loop
end loop;
--------------
loop
exit when i;
end loop;
-------------
i := tttt.first;
while i is not null
loop
i := tttt.next(i);
end loop;
-------------
open cur_1;
loop
fetch cur_1 into recVar;
exit when cur_1%notfound;
end loop;
close cur_1;-------------
for i in 1..10
loop
end loop;
-------------------
while true
loop
end loop;
loop
dbms_output.put_line(c.userid);
end loop;
FOR V_Record_Userlist in (select USERNAME,USERPWD FROM TEST6.TEST_2) loop---使用游标,这句话出错!!!
DBMS_OUTPUT.PUT_LINE(V_Record_Userlist.USERNAME||V_Record_Userlist.USERPWD);--打印
END LOOP;