Question

I am having trouble getting a query that only displays results between 6am yesterday and 6am today. Using sql server 2008. I have a timestamp column with type datetime

Answer 1

select * from your_table
where ts_col between 
             dateadd(hour, 6, DATEADD(day, DATEDIFF(day, 0, GETDATE()), -1))   
             and dateadd(hour, 6, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0));

SQLFiddle example