docs: Upload star schema

[Loc-04]

This pull request include the star schema ERD

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[perinst]

I've seen about this ERD but, I quite concerned about how to you find reason to choose 3 fact table and other Dim tables, Any document instruction about way do define before draw ERD and purpose of tables,

[Loc-04]

I've seen about this ERD but, I quite concerned about how to you find reason to choose 3 fact table and other Dim tables, Any document instruction about way do define before draw ERD and purpose of tables,

Hi, thanks for your question. To decide the grain of each fact table, i followed the dashboard mockup reference and based on the requirement of each dashboard from
Rookie Data - Phase 2.pdf

A fact is determined if the dashboard ask what (count/sum/avg) and what in the filter will be the 'context' for that fact (by region, agent, etc). Please give any suggestion if you feel this still not enough or wrong based on Kimball standard 👍

[Loc-04]

I've seen about this ERD but, I quite concerned about how to you find reason to choose 3 fact table and other Dim tables, Any document instruction about way do define before draw ERD and purpose of tables,

Read this pr first before viewing the ERD Schema : #12 (comment)