topic Load Left Join with resident table in QlikView

Load Left Join with resident table

lucarizziero — Fri, 26 Jun 2009 19:39:13 GMT

Hi all,

I have two table loaded:

table1:

prodID

prodDes

table2:

prodID

prodFlag

I'd need to obtain a table:

table3:

prodID

prodDes

prodFlag

containing the result of an SQL string like:

SELECT prodID, prodDes, prodFlag FROM table1 LEFT JOIN table2 ON table1.prodID=table2.prodID

I cannot use this SQL string in the DB source because table1 and table2 are in different datasources: so I'd need use a kind of

LOAD .... RESIDENT LEFT JOIN (LOAD .... RESIDENT)

Thanks

Fri, 26 Jun 2009 19:56:13 GMT

Hi,

You'll need to do something like that:

LEFT JOIN (table2) LOAD * RESIDENT table1;

but the trick is you'll have the concatenated result in the table2, not on a third table.

That was my initial mistake and I just figured it out...

Hope this helps,

Romain

stephencredmond — Fri, 26 Jun 2009 21:38:21 GMT

Hi,

Your script should look something like this:

table3:
Load
prodID,
prodDes
From sourcefortable1;

Left Join (table3)
Load
prodID,
prodFlag
From sourcefortable2;

It is not necessary to load the 2 tables into memory first. You can just go ahead and do this straight from the source.

Stephen

lucarizziero — Fri, 26 Jun 2009 22:35:57 GMT

Thanks a lot: your answer has been helpful.