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From: Daryl S on 21 May 2010 09:33
Tara -

What is the [PostedDate] for contactID 18792, and what are the StartDate and
EndDate values in tblDates? I assume all three of these are true date field
(that is, not text fields).

Make sure there is only one record in tblDates - if there is more than one
record, then this could cause a problem.

--
Daryl S


"Tara" wrote:

> tblDates is just a one-record table that is used to set date parameters for
> various queries in the database. Do you just mean a record from the first
> query that should show up in the second as well, based on that date
> parameter? If so, then yes - but I'm afraid I'm not sure how you want me to
> represent it here...
>
> Are you just asking for some general information about the record?
>
> If so, then for example - I have a record from the "one" table (tblContact)
> with a ContactID of 18792 that falls within the required date parameters that
> are set in the second query. It does not have a related record in
> tblAmendedDates (the "many" table) but it does show up in my initial query
> thanks to the left join.
>
> "Daryl S" wrote:
>
> > Tara -
> >
> > Do you have an example of a record from the first query plus a record from
> > tblDate that you think should be in the results of the second query, but
> > isn't there?
> >
> > --
> > Daryl S
> >
> >
> > "Tara" wrote:
> >
> > > Thanks Daryl...
> > >
> > > Here is the SQL for the query that works:
> > >
> > > SELECT tblContact.ContactID, tblContact.CaseID, tblContact.Date,
> > > IIf(tblAmendedDates.F2F Is Null,tblContact.F2F,tblAmendedDates.F2F) AS
> > > F2FAmended, IIf(tblAmendedDates.TeamMtg Is
> > > Null,tblContact.[TeamMtg],tblAmendedDates.TeamMtg) AS TeamMtgAmended,
> > > IIf(tblAmendedDates.CPC Is Null,tblContact.CPC,tblAmendedDates.CPC) AS
> > > CPCAmended, IIf(tblAmendedDates.CC Is Null,tblContact.CC,tblAmendedDates.CC)
> > > AS CCAmended, IIf(tblAmendedDates.OC Is
> > > Null,tblContact.OC,tblAmendedDates.OC) AS OCAmended,
> > > IIf(tblAmendedDates.Travel Is Null,tblContact.Travel,tblAmendedDates.Travel)
> > > AS TravelAmended, IIf(tblAmendedDates.NS Is
> > > Null,tblContact.NS,tblAmendedDates.NS) AS NSAmended,
> > > IIf(tblAmendedDates.Court Is Null,tblContact.Court,tblAmendedDates.Court) AS
> > > CourtAmended, IIf(tblAmendedDates.Training Is
> > > Null,tblContact.Training,tblAmendedDates.Training) AS TrainingAmended,
> > > IIf(tblAmendedDates.StaffMtg Is
> > > Null,tblContact.StaffMtg,tblAmendedDates.StaffMtg) AS StaffMtgAmended,
> > > IIf(tblAmendedDates.Admin Is Null,tblContact.Admin,tblAmendedDates.Admin) AS
> > > AdminAmended, IIf(tblAmendedDates.DSOther Is
> > > Null,tblContact.DSOther,tblAmendedDates.DSOther) AS DSAmended,
> > > tblContact.PostedDate, tblContact.DSTypeID, tblContact.OCTypeID,
> > > tblContact.numID, IIf(tblAmendedDates.Notes Is
> > > Null,tblContact.Notes,tblAmendedDates.Notes) AS NotesAmended
> > > FROM tblContact LEFT JOIN tblAmendedDates ON tblContact.ContactID =
> > > tblAmendedDates.ContactID;
> > >
> > >
> > > Here is the query (that doesn't work) that I'm trying to use the above query
> > > in:
> > >
> > > SELECT QryAmendedContacts.ContactID, QryAmendedContacts.CaseID,
> > > QryAmendedContacts.PostedDate AS [Date], QryAmendedContacts.F2FAmended,
> > > QryAmendedContacts.TeamMtgAmended, QryAmendedContacts.CPCAmended,
> > > QryAmendedContacts.CCAmended, QryAmendedContacts.OCAmended,
> > > QryAmendedContacts.TravelAmended, QryAmendedContacts.NSAmended,
> > > QryAmendedContacts.CourtAmended, QryAmendedContacts.TrainingAmended,
> > > QryAmendedContacts.StaffMtgAmended, QryAmendedContacts.AdminAmended,
> > > QryAmendedContacts.DSAmended, QryAmendedContacts.DSTypeID,
> > > QryAmendedContacts.OCTypeID, QryAmendedContacts.NotesAmended,
> > > QryAmendedContacts.numID
> > > FROM QryAmendedContacts, tblDates
> > > WHERE (((QryAmendedContacts.PostedDate) Between [tblDates]![StartDate] And
> > > [tblDates]![EndDate]));
> > >
> > >
> > > "Daryl S" wrote:
> > >
> > > > Tara -
> > > >
> > > > I suspect you may have some criteria in the second query that doesn't take
> > > > into account the null values for the cases where there is data for the 'one'
> > > > table and not for the 'many'. We can only help if you post the SQL for both
> > > > queries...
> > > >
> > > > --
> > > > Daryl S
> > > >
> > > >
> > > > "Tara" wrote:
> > > >
> > > > > I have a query set up with a one-to-many left join on two tables in order to
> > > > > pull all records from one table (the "one" side) and the corresponding
> > > > > records from another table (the "many" side), if they exist. It works well,
> > > > > but only in THAT query. In other words, if I run that query, the records
> > > > > show up as I want them to. But, if I then use that query in yet another
> > > > > query to further manipulate the data, the only records that show up are the
> > > > > records in the many table. Why and how can I fix it? I can post the query
> > > > > if needed.
From: Tara on 24 May 2010 10:19
I can't believe it took three people to make me see this! I guess I'd just
been at it too long because when I came back in this morning and read the
comments over again, I realized immediately you were all right. I guess my
brain was just too overworked. It really needed the weekend off.

Thank you all so very much!

"Marshall Barton" wrote:

> John Vinson also said the same thing so be sure to read his
> reply. Maybe he explained it in a way that is more
> understandable.
> --
> Marsh
> MVP [MS Access]
>
>
> Tara wrote:
> >I have to leave for the day soon and I won't be able to get back to this
> >until Monday morning. Thanks so much for all of your help and I hope I can
> >touch base with both of you again on Monday to pick your brains some more
> >about this issue.
> >
> >"Tara" wrote:
> >> That's essentially what Daryl said to look for too, but I can't find it. The
> >> only criteria is on PostedDate which originally comes from tblContacts, the
> >> "one" side.
> >>
> >> "Marshall Barton" wrote:
> >> > Tara wrote:
> >> > >I have a query set up with a one-to-many left join on two tables in order to
> >> > >pull all records from one table (the "one" side) and the corresponding
> >> > >records from another table (the "many" side), if they exist. It works well,
> >> > >but only in THAT query. In other words, if I run that query, the records
> >> > >show up as I want them to. But, if I then use that query in yet another
> >> > >query to further manipulate the data, the only records that show up are the
> >> > >records in the many table. Why and how can I fix it? I can post the query
> >> > >if needed.
> >> >
> >> >
> >> > Your second query probably has a criteria that weeds out the
> >> > records from the many side table that were not there to
> >> > begin with. Any criteria that compares a field in the many
> >> > table to anything will do that.
> .
>
From: Bob Barrows on 24 May 2010 10:48
I'm glad you've got your answer (actually, I'm a little puzzled about
the answer), but I just needed to throw this in:

> SELECT tblContact.ContactID, tblContact.CaseID, tblContact.Date
You should stop using "Date" as a field name. It's a reserved keyword
(being the name of a VBA function) and its use as a field name will
cause you problems down the road. If it is not too late in the design
process, you should change that fieldname to something more meaningful
(ContactDate?) so as to avoid the reserved keyword issues.

Tara wrote:
> I can't believe it took three people to make me see this! I guess
> I'd just been at it too long because when I came back in this morning
> and read the comments over again, I realized immediately you were all
> right. I guess my brain was just too overworked. It really needed
> the weekend off.
>


--
HTH,
Bob Barrows


From: Bob Barrows on 24 May 2010 10:56
John W. Vinson wrote:
> On Thu, 20 May 2010 11:42:01 -0700, Tara
> <Tara(a)discussions.microsoft.com> wrote:
>
>> Here is the query (that doesn't work) that I'm trying to use the
>> above query in:

>> FROM QryAmendedContacts, tblDates
>> WHERE (((QryAmendedContacts.PostedDate) Between
>> [tblDates]![StartDate] And [tblDates]![EndDate]));
>
> As Daryl and Marshall said, you're using a criterion on the query
> field PostedDate. For those records where no query record exists,
> that field will be NULL - and NULL is in fact *not* Between those two
> dates.
>
> Try changing the WHERE clause to
>
> WHERE QryAmendedContacts.PostedDate Between [tblDates]![StartDate] And
> [tblDates]![EndDate] OR QryAmendedContacts.PosteDate IS NULL

I don't understand. PostedDate comes from tblContact, the left side of
the query:

> ..., tblContact.PostedDate, ...
> FROM tblContact LEFT JOIN tblAmendedDates ON tblContact.ContactID =
> tblAmendedDates.ContactID;

If it's not Null in the original table, why would it be Null in the
output of QryAmendedContacts?


--
HTH,
Bob Barrows


From: Bob Barrows on 24 May 2010 11:21
John W. Vinson wrote:
> On Thu, 20 May 2010 11:42:01 -0700, Tara
> <Tara(a)discussions.microsoft.com> wrote:
>
>> FROM QryAmendedContacts, tblDates
>> WHERE (((QryAmendedContacts.PostedDate) Between
>> [tblDates]![StartDate] And [tblDates]![EndDate]));
>
> As Daryl and Marshall said, you're using a criterion on the query
> field PostedDate. For those records where no query record exists,
> that field will be NULL - and NULL is in fact *not* Between those two
> dates.
>
> Try changing the WHERE clause to
>
> WHERE QryAmendedContacts.PostedDate Between [tblDates]![StartDate] And
> [tblDates]![EndDate] OR QryAmendedContacts.PosteDate IS NULL

Repro:
tblContact:
ContactID PostedDate
1 5/1/2010
2 5/10/2010
3 5/16/2010
4 5/17/2010
5 5/20/2010
6 5/19/2010


tblAmendedDates:
ContactID AmendedDate AmendmentText
1 5/7/2010 ttt
1 5/8/2010 t2
3 5/20/2010 t1
3 5/21/2010 t2
6 5/20/2010 t1


QryAmendedContacts,
SELECT tblContact.ContactID, tblContact.PostedDate,
tblAmendedDates.AmendedDate, tblAmendedDates.AmendmentText
FROM tblContact LEFT JOIN tblAmendedDates ON tblContact.ContactID =
tblAmendedDates.ContactID;
returns:
ContactID PostedDate AmendedDate AmendmentText
1 5/1/2010 5/7/2010 ttt
1 5/1/2010 5/8/2010 t2
2 5/10/2010
3 5/16/2010 5/20/2010 t1
3 5/16/2010 5/21/2010 t2
4 5/17/2010
5 5/20/2010
6 5/19/2010 5/20/2010 t1

and this query
SELECT QryAmendedContacts.ContactID, QryAmendedContacts.PostedDate,
QryAmendedContacts.AmendedDate, QryAmendedContacts.AmendmentText
FROM QryAmendedContacts
WHERE (((QryAmendedContacts.PostedDate) Between #5/15/2010# And
#5/20/2010#));

returns the expected result:
ContactID PostedDate AmendedDate AmendmentText
3 5/16/2010 5/20/2010 t1
3 5/16/2010 5/21/2010 t2
4 5/17/2010
5 5/20/2010
6 5/19/2010 5/20/2010 t1


What am I missing?


--
Bob Barrows





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