Linking fields from unrelated tables

[bohsaly_mohamad_24]

Dear concerned,

I have two tables (unrelated according to the data model). One has [Start Year]-[End Year] and the other has [Fiscal Year]. I tried using if conditions within the set expression input box to display rows only when [Start/End Year] = [Fiscal Year], but it didn't work out.

Any suggestions?

Thanks,

Mohamad

[jonathandienst · Accepted solution]

An expression spanning two tables with no association forces Qlik to build a cartesian product (aka cross join)  of the two tables and the condition needs to be evaluated for every record in the cartesian product. On very very small models, you can get sway with this, but with larger models the best case is a very slow query (minutes, rather than seconds), the worst case is running out of RAM.

i am not sure what output you need, but you may need to interval match these two tables in the load to create an association.