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Asked: 2026-06-07T09:55:36+00:00

I have a question for which I found a rather long solution of which

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I have a question for which I found a rather long solution of which I don’t think that it is good practise.
However I feel there must be a syntax available that is able to solve this issue right away without too many complexities.
I bumped into this problem a few times already, and I’d like to know for once and for all.

I have a table called “T_STOP_LOSS”, in which I have three columns “LIVES_FROM”, “LIVES_TO” and “SL_VALUE” (All number types + the column containing ID with AutoNumber type).
I want to retrieve the record containing the SL_VALUE where a variable value lies in the interval between LIVES_FROM and LIVES_TO. 

ID  LIVES_FROM   LIVES_TO   NR_COUNTRIES_FROM   NR_COUNTRIES_TO SL_VALUE
1   0   999 2   2   39,3
12  0   999 3   3   34,6
23  0   999 4   4   29,6
34  0   999 5   9   25,7
45  0   999 10  100 22,17
46  1000    1499    2   2   31,1
2   1000    1499    3   3   27,4
13  1000    1499    4   4   23,3
24  1000    1499    5   9   20,4
35  1000    1499    10  100 17,5
36  1500    1999    2   2   23,6
47  1500    1999    3   3   20,7
3   1500    1999    4   4   17,7
14  1500    1999    5   9   15,4
25  1500    1999    10  100 13,3
26  2000    2999    2   2   23,6
37  2000    2999    3   3   20,7
48  2000    2999    4   4   17,7
4   2000    2999    5   9   15,4
15  2000    2999    10  100 13,3

Normally I would use: 

lNr_Lives = <Something> '(Retrieved via Textbox)
sSQL_Select = "SELECT SLVALUE FROM T_STOP_LOSS WHERE LIVES_FROM <= " & LNr_Lives & " AND LIVES_TO >= " & LNr_Lives & ";"

However, LIVES_FROM and LIVES_TO are related to the table NR_LIVES through a foreign key.
The above statement will never work because table ‘NR_LIVES’ contains an ID field as Primary Key, which is used to link to the T_STOP_LOSS table.
(The columns in NR_LIVES are named: ID, NR_LIVES_FROM and NR_LIVES_TO (not that it matters)). 

ID  NR_LIVES_FROM   NR_LIVES_TO
1   0   999
2   1000    1499
3   1500    1999
4   2000    2999

Please tell me, what would you consider to be the briefest way to access the real value of LIVES_FROM and LIVES_TO that is stored in the NR_LIVES table and get my SELECT statement working the way I expect it (Return the record that contains the SL for the right interval).

I hope that my question is clear. If not, don’t hesitate to mention.

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1 Answer

  1. Editorial Team

    Thanks to Nicolas, I found what I needed. 

    Dim cQueries                    As clsQueries
Dim oRst                        As DAO.Recordset
Dim sSQL_Select                 As String
Dim LNr_Lives                   As Long
Dim iNr_Countries               As Integer
Dim i As Integer


If Not IsNull(Me.txt_Nr_Lives) Then
    LNr_Lives = Me.txt_Nr_Lives
Else
    MsgBox "No number of lives defined!", vbCritical
    Exit Sub
End If

If Not IsNull(Me.cbb_Nr_Countries) Then
    iNr_Countries = Me.cbb_Nr_Countries
Else
    MsgBox "No number of countries defined!", vbCritical
    Exit Sub
End If

Set cQueries = New clsQueries
sSQL_Select = "SELECT " & _
                    "* " & _
                "FROM " & _
                    "T_STOP_LOSS " & _
                "INNER JOIN " & _
                    "NR_LIVES ON (T_STOP_LOSS.LIVES_FROM = NR_LIVES.ID) " & _
                " WHERE " & _
                    "NR_LIVES.NR_LIVES_FROM <= " & LNr_Lives & _
                " AND " & _
                    "NR_LIVES.NR_LIVES_TO >= " & LNr_Lives & _
                " AND " & _
                    "T_STOP_LOSS.NR_COUNTRIES_FROM <= " & iNr_Countries & _
                " AND " & _
                    "T_STOP_LOSS.NR_COUNTRIES_TO >= " & iNr_Countries & ";"

Set oRst = cQueries.Select_Statement(sSQL_Select)
oRst.MoveFirst

Do While Not oRst.EOF
    Me.txt_FSL = oRst![SL_VALUE]
    oRst.MoveNext
Loop
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