Limit-7 Day Date Selection

I am trying to use the limit line to select only rows with dates within the past 7 days.  Here is the custom SQL I tried:

$DB.Travel_Date  > (CURRENT_DATE  - 7 days)

 

Travel_Date is a field on my $DB table and “CURRENT_DATE -7 days” works on my request line.  The error I get is:

 

[Teradata](ODBC Teradata Driver)[Teradata Database]

Syntax error: expected something between an integer and the word ‘days’.