New to Power BI and Need some guidance

[dbrandone]

Hello everyone,

I am new to Power BI and DAX but have a SQL background. I have a large database that I manage within SQL and have organized my views and tables to get the data I need. I have one table that hypothetically has a customer in one column and then what they purchased in another column in the same table. The customers name could be found throughout the same column many, many times and the item they purchased can be found many times throughout its column many times. I need to show a list or a chart of the customers with which items they purchased and the quantity of each item. Any help would be appreciated. I have been in Dax Studio and new measure within power bi for hours today and I haven't been able to wrap my head around it. 

I know this is probably an easy measure but for some reason I cannot wrap my head around DAX. I am still waiting for that a-ha moment with it to where I can hit the ground running.

This is an example of what I mean by my example:

Customer	Item Purchased
John Doe	Hat
Jane Doe	Hat
Mike Smith	Hat
Carol Davis	Socks
Steve Williams	Scarf
Shawn Spencer	Shoes
Stephanie Davis	Hat
Mike Smith	Hat
Steve Williams	Shoes
Shawn Spencer	Hat
Stephanie Davis	Scarf
Jane Doe	Hat
Mike Smith	Socks
Carol Davis	Scarf
Steve Williams	Scarf
Shawn Spencer	Shoes
Stephanie Davis	Scarf
Mike Smith	Socks
Steve Williams	Hat
Shawn Spencer	Hat
Stephanie Davis	Hat

[v-yangliu-msft · Accepted solution]

Hi  @dbrandone ,

Here are the steps you can follow：

1. Create measure.

Count =
COUNTAX(FILTER(ALL('Table'),'Table'[Customer]=MAX('Table'[Customer])&&'Table'[Item Purchased]=MAX('Table'[Item Purchased])),'Table'[Item Purchased])

2. Take [Customer] as the slicer

3. Result:

Selecting a Customer displays the items and quantity he purchased

Best Regards,

Liu Yang

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

[parry2k]

@dbrandone as a best practice you want to create a star schema, in this case you should have 3 tables:

- customer dimension with all customers unique value

- product dimension with all products unique value

- sales fact table, contains customers, product, qty, amount etc etc

- sales table will have relationship with customer and product table, with one to many (one on dimension side)

add a measure, let's call it Sales Amount which will be SUM ( TableSales[Sales] ) 

To visualize, drop customer and/or product from dimension table and above measure and everything will work.

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