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MS Access Forum / Queries / May 2006Query on Occupany
I wish to determine what beds are available on a user specified date. I can query a specific date [Requested Date(dd/mm/yyyy)], however I can not get anything more than results of the beds booked on that date, whereas I would like that data PLUS results showing which beds were booked previously but are still occupied on the user specified date. I'm quite the n00b to SQL, so instead I have been entering combinations of <= and > etc with my Expected_Discharge and Admission_Date fields (both date/time) and unfortunately still havent found the results I know are there waiting. If you need more info to help me just ask :) Thanks! WHERE [Requested Date(dd/mm/yyyy)] Between [Admission_Date] and [Expected_Discharge] In the query grid Field: OnDate: [Requested Date(dd/mm/yyyy)] Criteria: Between [Admission_Date] and [Expected_Discharge] More efficient would be Field: Admission_Date Criteria: Admission_Date <= [Requested Date(dd/mm/yyyy)] Field: Expected_Discharge Criteria: >= [Requested Date(dd/mm/yyyy)] SQL where clause WHERE Admission_Date <=[Requested Date(dd/mm/yyyy)] AND Expected_Discharge >= [Requested Date(dd/mm/yyyy)] This makes the assumption that you always have a value in BOTH fields. If Expected_Discharge can be null then the criteria will have to be modified. > I wish to determine what beds are available on a user specified date. I can > query a specific date [Requested Date(dd/mm/yyyy)], however I can not get [quoted text clipped - 7 lines] > > Thanks! Thanks so much!!! I tried the grid criteria first, both cases produced blank results, so I opted for the SQL way and IT WORKED PERFECTLY :) I knew it'd be something simple and easily managed. :P Thanks again :) > WHERE [Requested Date(dd/mm/yyyy)] Between [Admission_Date] and [Expected_Discharge] > [quoted text clipped - 16 lines] > This makes the assumption that you always have a value in BOTH fields. If > Expected_Discharge can be null then the criteria will have to be modified. |
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