Remove comma and appersand if there is no secondary names

I have this in a field in query designer:

Name: [Primary Last Name] & ", " & [Primary First Name] & " & " & [Secondary Last Name] & ", " & [Secondary First Name]

If works fine in there is a secondary last name and a secondary first name.  But if isn't a secondary last name and a secondary first name I get an ampersand an a comma after the [Primary Last Name] & ", " & [Primary First Name].

How can I get rid of those extra characters if there is no [SecondaryLast Name] and [SecondaryFirst Name]

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Anders Ebro (Microsoft MVP)Microsoft DeveloperCommented:
When using the + sign instead of the & the concatenation acts differently. Null + string gives null, whereas Null & string gives string. This can be used in your case like so (test it)
Name: [Primary Last Name] & ", " & [Primary First Name] & (" & " + [Secondary Last Name]) & (", " + [Secondary First Name])

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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:

=[Primary Last Name] & IIf(Nz([Primary First Name],"")="","",", " & [Primary First Name]) & IIf(Nz([Secondary Last Name],"")="","",", " & [Secondary Last Name])
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