create view sss as(select ISNULL(operate_time, CONVERT(VARCHAR(20),create_time,120)) time from s_project); 一、ISNULL()函数 (oracle中为nvl()函数) ISNULL()函数 使 Read More
posted @ 2017-03-31 13:46 Tiger95 Views(422) Comments(0) Diggs(0) Edit