Queries :: DLookup Not Working With Certain Dates

Aug 30, 2014

Can't figure out why dlookup will not work for me in a query for certain dates?

Simple example to highlight the problem:

Table1 -

Read_Date----Read_Value
31/07/14-------10
01/08/14-------20
03/08/14-------30
20/08/14-------40

Query based on this table with the following calculated field:

Expr1: DLookUp("[Read_value]","Table1","Read_Date=#" &[Read_Date]& "#")

Query output -

Read_Date-----Expr1
31/07/14--------10
01/08/14
03/08/14
20/08/14--------40

Will not return a value for 01/08/14 or 03/08/14 (dd/mm/yy)

If you try it with many dates its skips several and I cannot see a pattern.

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Sep 15, 2005

I have set up an Attendance database at work, where a record is created for each member of staff when they are absent. The tables are set up as follows:

[tblStaff]: StaffID, FirstName, Surname, Team, JobTitle
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[code]....

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Code:
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ManagerID
Phone1
Phone2
Phone3
HollidayFrom
HollidayTill

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1
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Code:

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'---------------------------------------------------------------------------------------
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I have a table of records, which has within it two date fields (effectively, a 'start' and 'end' date for that particular record)

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So the first step (as I see it anyway) is to try to create a query which will give me each date between the two reference dates, in the hope that I can then JOIN that onto another query to perform the necessary calculation for each of the returned dates.

Is there a way to do this?

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03-Apr-2015
04-Apr-2015
05-Apr-2015
06-Apr-2015
07-Apr-2015
08-Apr-2015
09-Apr-2015

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Jul 8, 2014

I have two tables with dates. Between (!) every two following dates in table1, I want to know the number of dates in table2. How do I write an SQL query for this? The tables I have are up to a few hundred records in table 1 and a few thousand records in table2. So to prevent that this takes hours I need a fast query.

To explain the query I need, for example:
table1
01/01/2014
15/01/2014
17/01/2014
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table2
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02/01/2014
05/01/2014
17/01/2014
18/01/2014
20/01/2014
21/01/2014
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Between 15/01/2014 and 17/01/2014 in table 1 there are 0 dates in table 2
Between 17/01/2014 and 30/01/2014 in table 1 there are 4 dates in table 2

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