sql server - SQL SELECT DISTINCT for dynamic data -

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need little if possible: got data follows , filtered , inquiryid column trying work inquiry number of booking:

the last column has number of nights in trying calculate using excel 2007.

the column inq_date booked nights hotel stay , in case , enquiry 2 nights. each booking has amount of lines on equals amount of nights staying for.

a second booking follows:

7 lines - inquiryid = 9501

this booking 7 nights , differs first 1 above of 2 nights.

in column @ end , need calculate nights , on filtered data .

there 2 tables involved :

booking_inquiry booking_inquiry_rooms linked on : inquiryid

so far have:

in sql(which works has specified specific inquiryid)

select distinct count(inquiryid)from dbo.booking_inquiry_rooms  inquiryid = '9501'

this returns 7

i know there , need adapt clause , maybe dynamic parameter , cant life of me how...

can me please?

thanks,

matt

select   inquiryid,   count(*) nights     dbo.booking_inquiry_rooms group   inquiryid

just use group by...


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