开发与企业应用中,好几个版本SQL Server相互链接。分布式读取与存储,需要实现sp_addlinkedserver。SQL Server 2000, SQL Server 2008, SQL Server 2012和SQL Server 2014:但今天在本机的MSSQL Server 201...
select sum(case when xseventype<>'' then 1 else 0 end),
sum(case when zaeventype<>'' then 1 else 0 end),hotelcode
from info_hotelevent group by hotelcode