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#1
March 30th, 2005, 01:47 AM
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using query conditions to return a specific value or all values
using Access 2002...
I am trying to construct a query, using criteria which is selected from a combo box on a form. If a value is selected in the combo box, then the query will return only the value selected, but if no value is selected in the combo box (therefore the combo box has a null value) then the query will return all values. Using an IIF statement in the query criteria field, I can get the query to return the appropriate results if a value is selected from the combo box, but I am not able to return all values if nothing is selected in the combo box 
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#2
March 30th, 2005, 02:01 AM
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Use this as the criterion expression:
[Forms]![FormName]![ComboBoxName] Or [Forms]![FormName]![ComboBoxName] Is Null -- Ken Snell MS ACCESS MVP "ac512" wrote in message ... using Access 2002... I am trying to construct a query, using criteria which is selected from a combo box on a form. If a value is selected in the combo box, then the query will return only the value selected, but if no value is selected in the combo box (therefore the combo box has a null value) then the query will return all values. Using an IIF statement in the query criteria field, I can get the query to return the appropriate results if a value is selected from the combo box, but I am not able to return all values if nothing is selected in the combo box
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#3
March 30th, 2005, 02:13 AM
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Thank you very much Ken
Your help is much appreciated! AC "Ken Snell [MVP]" wrote: Use this as the criterion expression: [Forms]![FormName]![ComboBoxName] Or [Forms]![FormName]![ComboBoxName] Is Null -- Ken Snell MS ACCESS MVP "ac512" wrote in message ... using Access 2002... I am trying to construct a query, using criteria which is selected from a combo box on a form. If a value is selected in the combo box, then the query will return only the value selected, but if no value is selected in the combo box (therefore the combo box has a null value) then the query will return all values. Using an IIF statement in the query criteria field, I can get the query to return the appropriate results if a value is selected from the combo box, but I am not able to return all values if nothing is selected in the combo box
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