Ref: http://wxy0327.itpub.net/post/16888/149532

Oracle 動態SQL有兩種寫法：用 DBMS_SQL 或 execute immediate，建議使用後者。試驗步驟如下：

[@more@]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. 返回結果集
CREATE OR REPLACE package pkg_test as
/* 定義ref cursor型別
不加return型別，為弱型別，允許動態sql查詢，
否則為強型別，無法使用動態sql查詢;
*/
type myrctype is ref cursor;

--函式申明
function get(intID number) return myrctype;
end pkg_test;
/

CREATE OR REPLACE package body pkg_test as
--函式體
function get(intID number) return myrctype is
rc myrctype; --定義ref cursor變數
sqlstr varchar2(500);
begin
if intID=0 then
--靜態測試，直接用select語句直接返回結果
open rc for select id,name,sex,address,postcode,birthday from student;
else
--動態sql賦值，用:w_id來申明該變數從外部獲得
sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id';
--動態測試，用sqlstr字串返回結果，用using關鍵詞傳遞引數
open rc for sqlstr using intid;
end if;

return rc;
end get;

end pkg_test;
/

Oracle 動態SQL

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