Creating query based on form

[Kaspa]

I am creating a contact database and I would like the user to create
his own groups of contacts based on criterias, thefore I would like to
let him pick the fields and criteria for a particular group. I don't
wanna a form full of fields that ask the user for arguments. Instead a
subform with a combobox where the user picks the [field], the
[operator], and the [arguement]

So I would have two tables groups and GroupCriteria for instance:

group field operator criteria
_______________ _______________ ______

Accounts city = brooklyn

Accounts status < active


I then would live to each record to supply the query with these
arguements. Is the wrong way to go about it? How can I create my own
arguement. I see examples on how to pass but how do I create it using
code?

[Kaspa]

Re: Creating query based on form

this is the function that I am thinking might do it:

Function getsource(group )

End Function
Dim rec As DAO.Recordset
Dim db As DAO.Database
Set db = CurrentDb()
Dim sql As String
Dim qdf As QueryDef
Dim strsql As String
Dim fieldn As String
Dim oper As String
Dim crit As String
Dim surplus As String

Set rec = db.OpenRecordse t("select * from tblGroupCriteri a where
groupid = " & group)

strQueryName = "qryTemp"
If ((rec.BOF) And (Not rec.EOF)) Then
strsql = "SELECT * from tblIndividuals"
Set qdf = db.CreateQueryD ef(strQueryName , strsql)
Exit Function
End If

strsql = "SELECT * from tblIndividuals where "
With rec
If Not .EOF Then
fieldn = !FieldName
oper = !Operator
crit = !Criteria
End If
surplus = fieldn & " " & oper & " " & crit & "and"
strsql = strsql & surplus

Do While Not .EOF
fieldn = !FieldName
oper = !Operator
crit = !Criteria
surplus = "and" & fieldn & " " & oper & " " & crit
strsql = strsql & surplus
Loop
End With

End Function

[pietlinden@hotmail.com]

Re: Creating query based on form


Kaspa wrote:

I am creating a contact database and I would like the user to create
his own groups of contacts based on criterias, thefore I would like to
let him pick the fields and criteria for a particular group. I don't
wanna a form full of fields that ask the user for arguments. Instead a
subform with a combobox where the user picks the [field], the
[operator], and the [arguement]
>
So I would have two tables groups and GroupCriteria for instance:
>
group field operator criteria
_______________ _______________ ______
>
Accounts city = brooklyn
>
Accounts status < active
>
>
I then would live to each record to supply the query with these
arguements. Is the wrong way to go about it? How can I create my own
arguement. I see examples on how to pass but how do I create it using
code?

off the top of my head (do I ever do anything any other way?), You
could open a recordset of all the records for a specific group, e.g.
SELECT Group, Field, Operator, Criteria
FROM GroupCriteria
WHERE group = <point at a form here?>

Then you could simply walk through the recordset...

do until rs.EOF
strFilter = strFilter & " AND " &
rs.Fields("Fiel d") & rs.Fields("Oper ator") & fDelimiter(fiel dType)
& rs.Fields("Valu e") & fDelimiter(fiel dType)

rs.MoveNext

Loop

or you could save these as different queries (just not let the user see
them)...

[pietlinden@hotmail.com]

Re: Creating query based on form

Kaspa,

I was thinking along the same lines (doesn't make it right, mind you).
One thing I thought about, though, is delimiters - stuff that the QBE
grid puts in there for you. (so maybe if you build querydefs on the
fly, you may not need them). you might want to check field types so
that you're sure you include delimiters for literal values, like dates
(#), strings ('), etc.

I guess if you wait for the other folks here to sleep and have coffee,
you'll get more answers.

but that's my two cents... at a discount.

Pieter

[Kaspa]

Re: Creating query based on form

thank you for that, I was not think about it.


pietlinden@hotm ail.com wrote:

Kaspa,
>
I was thinking along the same lines (doesn't make it right, mind you).
One thing I thought about, though, is delimiters - stuff that the QBE
grid puts in there for you. (so maybe if you build querydefs on the
fly, you may not need them). you might want to check field types so
that you're sure you include delimiters for literal values, like dates
(#), strings ('), etc.
>
I guess if you wait for the other folks here to sleep and have coffee,
you'll get more answers.
>
but that's my two cents... at a discount.
>
Pieter

[Kaspa]

Re: Creating query based on form

Anybody else has any input?
pietlinden@hotm ail.com wrote:

Kaspa wrote:

I am creating a contact database and I would like the user to create
his own groups of contacts based on criterias, thefore I would like to
let him pick the fields and criteria for a particular group. I don't
wanna a form full of fields that ask the user for arguments. Instead a
subform with a combobox where the user picks the [field], the
[operator], and the [arguement]

So I would have two tables groups and GroupCriteria for instance:

group field operator criteria
_______________ _______________ ______

Accounts city = brooklyn

Accounts status < active


I then would live to each record to supply the query with these
arguements. Is the wrong way to go about it? How can I create my own
arguement. I see examples on how to pass but how do I create it using
code?

>
off the top of my head (do I ever do anything any other way?), You
could open a recordset of all the records for a specific group, e.g.
SELECT Group, Field, Operator, Criteria
FROM GroupCriteria
WHERE group = <point at a form here?>
>
Then you could simply walk through the recordset...
>
do until rs.EOF
strFilter = strFilter & " AND " &
rs.Fields("Fiel d") & rs.Fields("Oper ator") & fDelimiter(fiel dType)
& rs.Fields("Valu e") & fDelimiter(fiel dType)
>
rs.MoveNext
>
Loop
>
or you could save these as different queries (just not let the user see
them)...