How to mimimize used memory when querying same table twice?

[GoingIncognito]

I was forwarded today a question that really boils down to:

Same table needs to be queried twice. Or to be more precise, in Power Query Editor the query towarded to table needs to be reiterated. One query brings a whole lot of rows and the other only a few rows. In this scenario what is the best way to save used memory? The source is SQL Server, so the query could be written as T-SQL. I'm quessing a T-SQL query that brings only needed rows could be the best way to limit memory usage?

Also I'm still in process of reading this:
https://blog.crossjoin.co.uk/2016/11/20/referenced-queries-and-caching-in-power-bi-and-power-query/ 

[v-lionel-msft · Accepted solution]

Hi @GoingIncognito ,

For memory optimization problems, you can refer to these articles:

Ten Techniques for Optimising Memory Usage in Microsoft Power BI 

https://blog.pragmaticworks.com/power-bi-performance-tips-and-techniques 

https://community.powerbi.com/t5/Desktop/Power-BI-in-memory-RAM-Overload/td-p/123662 

Best regards,
Lionel Chen

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