# New to Qlik Sense

Discussion board where members can get started with Qlik Sense.

Contributor

## Where not Exists()

Here's a script I don't quite understand:

.....

PostalCode as PostCode,

.....

Resident Customer

Where not Exists(PostCode,PostalCode);

What is the use of Where not Exists(PostCode,PostalCode)?

Thanks for help!

2 Replies
Honored Contributor II

## Re: Where not Exists()

Esteemed Contributor

## Re: Where not Exists()

after you understand the Exist function and in addition to the information described on the link above, you can replace your script by this: