sql server 2008 - Is this is the best way to write SQL for this report? -



sql server 2008 - Is this is the best way to write SQL for this report? -

we have orders info , need generate weekly - custom date range of 7 daysreport using sql. study display weekly count of orders. user select end date , need create 12 daterange units based on date. illustration user selects 1/24/2013 need 12 points/units as:

point12 = end date - 7 days point11 = end date - 14 days point10 = end date - 21 days point9 = end date - 28 days . . point1 = end date - x days

our solution:

we planning create temporary table table have 12 rows. each row have info (we calculate startdate , enddate each point):

point startdate enddate totalorders point12 2013-01-24 2013-01-30 point11 2013-01-17 2013-01-23

after count of orders each row.

is solution problem or can optimized?

edit:

the weekly daterange custom date range of 7 days.

given sqlserver, suggest using table variable, rather temporary table.

an alternative approach generate 12 rows in cte part of main query, rather generating required rows (in table variable/temporary table) separate step prior main query. cut down total number of steps required, create main query more complicated.

sql sql-server-2008 count group-by

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