Oracle存儲過程中EXECUTE IMMEDIATE用法

• execute immediate：動態解析sql語句

  CREATE OR REPLACE PROCEDURE PRO_TEST() IS
    V_SQL VARCHAR2(2000) := '';
    V_NUM NUMBER;
  BEGIN
    --EXECUTE IMMEDIATE用法1:立刻執行
    V_SQL := 'create or replace view mytest as select employee_id, first_name from employees';
    EXECUTE IMMEDIATE V_SQL;
    --EXECUTE IMMEDIATE用法2:立刻執行,並賦值給某變量
    V_SQL := 'select count(1) from employees';
    EXECUTE IMMEDIATE V_SQL;
    INTO V_NUM;
    --EXECUTE IMMEDIATE用法3:帶參數的sql
    V_SQL := 'select * from employees e where e.employee_id = :1 and first_name = :2';
    EXECUTE IMMEDIATE V_SQL;
    USING 200, 'Jennifer';
  END PRO_TEST;