Ms access 2007 between query for date

Question

Dear All,
I am using the below query to fetch records from a table between two dates
select * from tablename where Format([VisitDate],"Short Date") >=Format(#01/10/2014#,"Short Date") and Format([VisitDate],"Short Date") <=Format(#31/10/2014#,"Short Date")
I want records between 1st Oct to 31st Oct only, but the above query shows Nov and December data also. Please let me know where I am going wrong.
Regards,
Noor 
Thanks & Regards, Noor Hussain

Answer 1

The Format function returns a string expression, so the comparison is on that basis not on the date value.  You do not need to worry about the format at all as the date/time data type in Access is implemented as a 64 bit floating point number. 
You can see it in whatever date/time format you wish, but the underlying value is always the same.  When you include a date literal in an SQL statement or in VBA code it must be either in US short date format (mm/dd/yyyy), or in an internationally unambiguous
format.  The ISO standard format for date notation of YYYY-MM-DD is a good choice.  So you query would be:
SELECT *
FROM tablename
WHERE VisitDate  >=  #2014-10-01#
AND VisitDate < #2014-11-01#;
Note that the range is defined as on or after the start date and before the day following the end date.  This ensures that all relevant rows are returned.  As there is no such thing in Access as a 'date value', but only a 'date/time value' it is possible
that a 'date' of 31 October 2014 could have a non-zero time of day element unless you have taken steps in the table definition to specifically exclude values with a non-zero time of day.  Such date/time values would not fall within a range ending <=
#2014-10-31#, so would not be returned by the query.  Defining the end of the range with < #2014-11-01# ensures that such rows are returned.
Ken Sheridan, Stafford, England