Oracle存储过程中EXECUTE IMMEDIATE用法

• execute immediate：动态解析sql语句

  CREATE OR REPLACE PROCEDURE PRO_test() IS
    V_sql VARCHAR2(2000) := '';
    V_NUM NUMBER;
  BEGIN
    --EXECUTE IMMEDIATE用法1:立刻执行
    V_sql := 'create or replace view mytest as select employee_id, first_name from employees';
    EXECUTE IMMEDIATE V_sql;
    --EXECUTE IMMEDIATE用法2:立刻执行,并赋值给某变量
    V_sql := 'select count(1) from employees';
    EXECUTE IMMEDIATE V_sql;
    INTO V_NUM;
    --EXECUTE IMMEDIATE用法3:带参数的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;