Oracle動態(tài)SQL返回單條結(jié)果和結(jié)果集

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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:='測試人員';
v_2:='北京';
str := 'INSERT INTO test (name ,address) VALUES (:1, :2)';
EXECUTE IMMEDIATE str USING v_1, v_2;
commit;
end;

2. 返回單條結(jié)果

declare
str varchar2(500);
c_1 varchar2(10);
r_1 test%rowtype;
begin
c_1:='測試人員';
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.NAME||R_1.ADDRESS);
end ;

3. 返回結(jié)果集

CREATE OR REPLACE package pkg_test as
/**//* 定義ref cursor類型
不加return類型，為弱類型，允許動態(tài)sql查詢，
否則為強類型，無法使用動態(tài)sql查詢;
*/
type myrctype is ref cursor;

--函數(shù)申明
function get(intID number) return myrctype;
end pkg_test;
/

CREATE OR REPLACE package body pkg_test as
--函數(shù)體
function get(intID number) return myrctype is
rc myrctype; --定義ref cursor變量
sqlstr varchar2(500);
begin
if intID=0 then
--靜態(tài)測試，直接用select語句直接返回結(jié)果
open rc for select id,name,sex,address,postcode,birthday from student;
else
--動態(tài)sql賦值，用:w_id來申明該變量從外部獲得
sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id';
--動態(tài)測試，用sqlstr字符串返回結(jié)果，用using關(guān)鍵詞傳遞參數(shù)
open rc for sqlstr using intid;
end if;

return rc;
end get;

end pkg_test;
/