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How to Change SQL property of saved query (DAO)

How To

How to Change SQL property of saved query (DAO)

by  dhookom  Posted    (Edited  )
There are times when the easiest method of creating complex queries with multiple filters is to change the SQL property of a saved query. This works well when you need to send form/control parameters to a pass-through query.

Assuming you have a query "qselMyQuery" that needs a couple dates from controls on a form. Your code might look like:
Code: 
Dim strSQL as String
Dim strOldSQL as String
strSQL = "SELECT field1, field2, field3 FROM tblMyTable " & _
    "WHERE OrderDate BETWEEN #" & Me.txtStart & "# AND #" & _
    Me.txtEnd & "# " & _
    "ORDER BY field2, field1 DESC"
strOldSQL = fChangeSQL("qselMyQuery",strSQL)
The function is:
Code: 
Function fChangeSQL(pstrQueryName As String, strSQL As String) As String
[green]'=============================================================
' basQueryDefs.ChangeSQL
'-------------------------------------------------------------
' Purpose : update the SQL property of a saved query
' Copyright: Duane Hookom
' Author : Duane Hookom
' Notes :
'-------------------------------------------------------------
' Parameters
'-----------
' pstrQueryName (String) Name of saved query
' strSQL (String)        SQL Statement
'-------------------------------------------------------------
' Returns: the previous SQL statement
'-------------------------------------------------------------
' Revision History
'-------------------------------------------------------------
' 07-09-2001 DKH:
'=============================================================
' End Code Header block[/green]
    Dim db As DAO.Database
    Dim qd As DAO.QueryDef
    Set db = CurrentDb
    Set qd = db.QueryDefs(pstrQueryName)
    fChangeSQL = qd.SQL
    qd.SQL = strSQL
    Set qd = Nothing
    Set db = Nothing
End Function
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