isNUll ,对于sql中的一个表的description的NULL和空格的处理

select client.clientname ,description,'client2'=

case

when client.Description IS NULL then  client.clientname

when ltrim(rtrim(client.Description))='' then client.clientname

else

client.clientname +' - '+ client.Description

end from T_CSC_ClientMaster as client

 

 

 

select client.clientname ,description,'client2'=

case

when ISNULL(client.Description,'')=''then client.clientname

else

client.clientname +' - '+ client.Description

end

from T_CSC_ClientMaster as client

两种用法，但还明显的是下面哪种更加简单。