标签:tab har ble col char ref sqlserver target size
转自:http://www.maomao365.com/?p=6965
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
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
mssql sqlserver 将字段null(空值)值替换为指定值的三种方法分享
标签:tab har ble col char ref sqlserver target size
原文地址:https://www.cnblogs.com/lairui1232000/p/9379953.html