MySQL中 FIND_IN_SET 與 IN 的區別

查詢語句用 FIND_IN_SET（）函數：

SELECT * FROM t_userbydepartment WHERE FIND_IN_SET(departmentid,'20,168,190,181');

查詢語句用 IN ：

SELECT * FROM t_userbydepartment WHERE departmentid in ('20,168,190,181');