cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
THEG72 Helper V
Helper V

What makes for a better index column?

Hi Support and Community,

 

What makes for a better unique key between fact and dimension tables as far as speed and compression go?

 

The UID or the ACCOUNT Number shown below in my chart of accounts?


The UID is a longer alphanumeric field and the account number is a fair bit smaller.. Both are text fields in the model.

 

Capturew.PNGWhich column should i index?

2 REPLIES 2
Super User II
Super User II

Re: What makes for a better index column?

Hi. I don't think you will found a significant difference. The short one may go faster. The best performance is with int values, but again I don't think you will notice so much difference in this case.

 

Regards,



If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Happy to help!

LaDataWeb Blog


Highlighted
THEG72 Helper V
Helper V

Re: What makes for a better index column?

@ibarrau  thanks for your reply. Yes my understanding is text characters are slower than number/integer values. The account number however cant be resovled as a number due to the hyphen so it's formatted as text column like the uid.

Helpful resources

Announcements
New Ranks Launched March 24th!

New Ranks Launched March 24th!

The time has come: We are finally able to share more details on the brand-new ranks coming to the Power BI Community!

‘Better Together’ Contest Finalists Announced!

‘Better Together’ Contest Finalists Announced!

Congrats to the finalists of our ‘Better Together’-themed T-shirt design contest! Click for the top entries.

Arun 'Triple A' Event Video, Q&A, and Slides

Arun 'Triple A' Event Video, Q&A, and Slides

Missed the Arun 'Triple A' event or want to revisit it? We've got you covered! Check out the video, Q&A, and slides now.

Join THE global Microsoft Power Platform event series.

Join THE global Power Platform event series.

Attend for two days of expert-led learning and innovation on topics like AI and Analytics, powered by Dynamic Communities.

Community Summit North America

Community Summit North America

Innovate, Collaborate, Grow. The top training and networking event across the globe for Microsoft Business Applications

Top Solution Authors
Top Kudoed Authors