Question

As the title state, I have a bit problem with sql statement. I have a table as below, 3 columns : date_time_booking, date_time_use, member_ID

Date_time_booking

• 1/4/2012
• 2/4/2012 etc.

Date_time_use

• 5/4/2012
• 10/4/2012 etc.

Member_ID is Null if it is a non_member booking, not Null if it is a member

I need a query to calculate how far in advance of the booking of member and non-member of the sport center. Help/Correction/Suggestion are appreciated. Thank you

EDIT: This is what I have so far

SELECT 
   Member_ID, 
   DateDiff("d",[Date_time_to_use],[Date_time_booked]) AS Day_in_advance
FROM Court_booking
GROUP BY Member_ID

Answer 1

You can use DateDiff in your query.

SELECT DateDiff("d",[Date_time_use],[Date_time_booking]) AS Diff
FROM Table1

You can create a query using the query design window.

Edit re comments

SELECT 
   Member_ID, 
   Sum(DateDiff("d",[Date_time_to_use],[Date_time_booked])) AS Sum_Day_in_advance
FROM Court_booking
GROUP BY Member_ID