Convert Sql query to Qliksense script

[Syed17]

Please help me to convert this query into qliksense script using qvds tables

Where pis7.ap_invoice_num not in (select invs7.invoice_num from ap_invoices_all invs7 where INVs7.SOURCE = 'Oracle Property Manager')

[SunilChauhan]

Table1:
Load 

 invs7.invoice_num as invoice_num,

...

from ap_invoices_all invs7 where INVs7.SOURCE = 'Oracle Property Manager'

Load 

invoice_num,

...

from frist Table   where not EXISTS(invoice_num,invoice_num) ;

drop table table1;

hope this helps

[Syed17]

I don't get proper solution by this step.