Dropping table after merging

[adjrock]

Hi all,

I'm quite new to Power Bi. Just wondering if there's a functionality to drop a table once you are done appending it to a main table that will be used in the data model? The benefit i look for is a cleaner data model to work with and potentially decluttering memory held by Pbi when in use. Appreciate any advise.

[v-shex-msft]

Hi @adjrock,

Nope, you can't drop these tables be caused merge function has referenced these tables.
For your requirement, I'd like to suggest you add some custom steps to store original source table and do merge operations, it does not require to reference other tables.

Old: not able to drop original tables.

Query1:
let
   Source='connector formula'
in
   Source

Query2:
let
   Source='connector formula'
in
   Source

Merge:
let
   Source=Table.Combine({Query1,Query2})
in
   Source

New: merge into one query.

let
   Source1='connector formula',//Query1
   Source2='connector formula',//Query2
   Merge=Table.Combine({Source1,Source2})
in
   Merge

Regards,

Xiaoxin Sheng

[adjrock]

seems like the main table is getting updated despite the required tables being "Disabled" (unchecked Enable). Shouldn't the main ables fail then? Or is it loading old stale data. I suppose I can check but Power Query is so slow at the moment that I'm about to raise a support ticket if it exists 😄

[v-shex-msft]

HI @adjrock,

it seems like you turn off the loading option on original query tables.
In fact, your tables are being referenced by your merge table, so these tables still loading records for the merge operation. (they do not display in data model tables)

Any advanced operation added in your table? They will case the duplicate calculation and spend more memory resources.

Regards,

Xiaoxin Sheng

[danextian · Accepted solution]

Hi @adjrock ,

I am assuming drop means not loading the query to the model. Right-click on the query that you have already appended then uncheck Enable load. The query will be grayed out and the name italicized once load has been disabled.