Query a comma delimited list

Question

Suppliers is a field containing a comma delimited list of
Supplier ID's.
When a supplier logs in they should be able to view all the
auctions that they have been registered for
i.e if their supplierID is in the suppliers field.
have tried this and get an error:
<CFQUERY NAME="GetAuctions"
DATASOURCE="#Application.Datasource#">
SELECT * FROM Auctions
WHERE '#Session.SupplierID#' IN 'Auctions.Suppliers'
</CFQUERY>
have tried this and recordcount is 0 when it should be 3:
<CFQUERY NAME="GetAuctions"
DATASOURCE="#Application.Datasource#">
SELECT * FROM Auctions
WHERE '#Session.SupplierID#' LIKE 'Auctions.Suppliers'
</CFQUERY>

Answer 1

You should avoid having a list value in a field and normalise
your table. But if you want to stick with your style(which is not
advisable), maybe you can do this. I believe your supplier id is a
string so the code below may cause slowness in your system:
<CFQUERY NAME="GetAuctions1"
DATASOURCE="#Application.Datasource#">
SELECT Suppliers FROM Auctions
</CFQUERY>
<cfoutput query="GetAuctions1">
<CFQUERY NAME="GetAuctions2"
DATASOURCE="#Application.Datasource#">
SELECT * FROM Auctions
WHERE '#Session.SupplierID#' IN(<cfqueryparam
values="#Suppliers#" cfsqltype="CF_SQL_VARCHAR" list="Yes">)
</CFQUERY>
</cfoutput>
But if your supplier id is a numeric value. then you can do
this:
<CFQUERY NAME="GetAuctions"
DATASOURCE="#Application.Datasource#">
SELECT A1.* FROM Auctions A1
WHERE #Session.SupplierID# IN(SELECT A2.Suppliers FROM
Auctions A2 WHERE A2.your_primary_key_for_table_Auctions =
A1.your_primary_key_for_table_Auctions)
</CFQUERY>