mssqlsqlserver将字段null（空值）值替换为指定值的三种⽅法 分享
摘要:
下⽂将分享两种将字段中null值替换为指定值的⽅法分享，如下所⽰:
例:
create table test(keyId int identity, info varchar(30))
go
insert into test(info)values('a'),('b'),(null),('d')
go
---⽅法1：使⽤isnull替换
select keyId,isnull(info,'替换null值') as info from test
go
msinfo---⽅法2：使⽤case when 替换
select keyId,case when info is null then '替换null值' else info end as info from test
---⽅法3：使⽤coalesce替换相应的值
select keyId , coalesce(info,'替换null值') as info from test
go
truncate table test
drop table test
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