declare @ct int
declare @sql nvarchar(2000)
set @sql = 'select @ct = count(*) from center_dhmx'
execute sp_executesql @sql,N'@ct int output',@ct output
select @ct
declare @sql nvarchar(2000)
set @sql = 'select @ct = count(*) from center_dhmx'
execute sp_executesql @sql,N'@ct int output',@ct output
select @ct