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Home > Help > TechHelp > Directory > Access > DLookup < QQ4 | Quote, Invoice, Receipt >
 
DLookup
By Richard Rost   Richard Rost on Twitter Richard Rost on LinkedIn Email Richard Rost   3 months ago

Use DLookup to Look Up a Value from a Table


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In this video, I'll show you how to use the DLookup function to look up a value from a table or query. We will look up a sales rep's phone number based on his ID.

Mitchell from Akron, Ohio (a Gold Member) asks: Each of my customers have an assigned sales rep. I've got the rep's name displayed in a combo box on the customer form. Is there a way that I could have his phone number appear next to it so I don't have to keep clicking and loading different forms? I tried making the phone number the second column in the sales rep combo box, but people still have to click to open it up to see it, and sometimes people accidentally change the rep. I just want the phone number to appear next to his name in a text box.

Common Formats

  • DLookup("Field", "Domain", "Criteria")
  • DLookup("FirstName", "CustomerT", "CustomerID=5")
  • DLookup("FirstName", "CustomerT", "CustomerID=" & CustomerCombo)
  • DLookup("StateName", "StateT", "StateAbbreviation=""" & State & """")
  • DLookup("OrderID", "OrderT", "OrderDate=#" & LastOrderDate & "#")
  • DLookup("CustomerID", "CustomerT", "FirstName=""" & FN & """ AND LastName=""" & LN & """")

Members

Members will learn how to handle DLookup criteria involving text strings and dates and use NZ to deal with NULL values. We will learn about AND/OR conditions in criteria. We will see how to use DLookup with DMax and DSum to get the date and amount of a customer's most recent order.

Silver Members and up get access to an Extended Cut of this video. Gold Members can download the database template from class plus get access to the Code Vault. If you signed up on YouTube you have to contact me so I can set up your account here on my web site. If you're not a member, Join Today!

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Keywords

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Columns in Combo box Upload Images   Link 
Scott Axton 
3 months ago
Richard -
I'm trying to wrap my head around using the columns in a combo box.  Just finished watching this video and also Developer 15 where you use .Column(0,x) in an example in lesson 3. Read More...
Richard Rost
3 months ago
Yes, Scott, you could absolutely use the second column from the combo box, however the point was to show DLookup. In THIS case it would work, but you can't load certain values into a combo box (like Long Text) and you may want to DLookup more values than you would normally put into the combo box, or even not know which field you want to look up until runtime. Hence, DLookup.

.Column(0,x) is just another way of saying Column Y, Row X. It's used for List Boxes.
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