use UserCenter
go
select * from AccountDetails
1、判断一个字段是否为null值,进行查询:
update AccountDetails set ProjectCode =‘w88‘ where ProjectCode is null
2、这一种写法是错误的
update AccountDetails set ProjectCode =‘w88‘ where ProjectCode = null
判断数据库表字段是否为null值,采用is null,布布扣,bubuko.com
原文地址:http://www.cnblogs.com/BluceLee/p/3785917.html