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
时间: 2024-10-13 08:13:24