Time and date dimension in data warehouse

Question

I\'m building a data warehouse. Each fact has it\'s timestamp. I need to create reports by day, month, quarter but by hours too. Looking at the examples I see that

Answer 1

Time should be a dimension on data warehouses, since you will frequently want to aggregate about it. You could use the snowflake-Schema to reduce the overhead. In general, as I pointed out in my comment, hours seem like an unusually high resolution. If you insist on them, making the hour of the day a separate dimension might help, but I cannot tell you if this is good design.