Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: Visual Basic
Expertise: Beginner
Apr 8, 1999



Application Security Testing: An Integral Part of DevOps

Check Inequality of Database Field Values

Conventional wisdom suggests this code works fine when checking a field in a database-or any Variant, for that matter-for inequality to some other value:
If ![Name] <> "abc" Then
	Debug.Print "<>"
	Debug.Print "="
End If
In reality, however, this isn't always the case. For example, if the field you're checking is of value Null, then the test also returns Null, invoking the Else clause. A quick, though perhaps obscure solution, is to check for equality instead:
If ![Name] = "abc" Then
	Debug.Print "="
	Debug.Print "<>"
End If
Andrew L.
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date