Oracle 动态SQL返回单条结果和结果集

1. DDL 和 DML

/**//*** DDL ***/

begin

EXECUTE IMMEDIATE 'drop table temp_1';

EXECUTE IMMEDIATE 'create table temp_1(name varchar2(8))';

end;

/**//*** DML ***/

declare

v_1 varchar2(8);

v_2 varchar2(10);

str varchar2(50);

begin

v_1:='测试人员';

v_2:='北京';

str := 'INSERT INTO test (name ,address) VALUES (:1, :2)';

EXECUTE IMMEDIATE str USING v_1, v_2;

commit;

end;

2. 返回单条结果

declare

str varchar2(500);

c_1 varchar2(10);

r_1 test%rowtype;

begin

c_1:='测试人员';

str:='select * from test where name=:c WHERE ROWNUM=1';

execute immediate str into r_1 using c_1;

DBMS_OUTPUT.PUT_LINE(R_1.NAMER_1.ADDRESS);

end ;

3. 返回结果集

CREATE OR REPLACE package pkg_test as

/**//* 定义ref cursor类型

不加return类型，为弱类型，答应动态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要害词传递参数

open rc for sqlstr using intid;

end if;

return rc;

end get;

end pkg_test;