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: 实验环境:sqlserver 2008 R2

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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    ---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