Count unique orderers

[thorpyuk]

Hi All,

I have a sales table, and a site table, linked on [TerminalID] which is the till number. I want to count the unique ordering sites for each individual product that might be ordered... [Prodcode] is my product ID

Thanks in advance!

[thorpyuk]

Anyone any other suggestions?

[camargos88]

@thorpyuk ,

Have you tried to count by the id for the site table ?

Something like:

DISTINCTCOUNT(ID_SITE_TABLE)

Ricardo

[thorpyuk]

Hi Camargos88, yes that just gives me the total number of distinct sites (56) against each product, but i want only the number of those sites that have ordered

[camargos88]

@thorpyuk ,

Can you provide some data as example ?

Ricardo

[thorpyuk]

Hi Camargos, here's the layout of my sales table ( db_v_SalesProduct ) and my site table ( db_v_LookupSite ).

They appear to link on the [TerminalID] field, but as i say, each site will have multiple terminals.

How do i share a file with data?

[camargos88]

@thorpyuk ,

You can use onedrive, google drive, dropbox...

[Anonymous]

Ah ok, I see. So each SiteID can have 1 or more TerminalIDs, and you want the measure to return the number of distinct SiteIDs for each ProdCode. Try this

Ordering Sites = 
    COUNTROWS(
        SUMMARIZE(
        'Sales',
     Sales[TerminalID],
        "SiteID", LOOKUPVALUE('Terminal'[SiteID], Terminal[TerminalID], 'Sales'[TerminalID])
   )
)

[thorpyuk]

Hi EylesIT, yes that's exactly what i want to do! I'm close with that code you posted - i've edited it to the correct table names, but i must have missed something, or misunderstood some of your code, as it's counting the total terminals rather than the total sites.

Here's what i've done:

CountOrds = 
    COUNTROWS(
        SUMMARIZE(
        'db_v_SalesProduct',
     db_v_SalesProduct[TerminalID],
        "SiteCode", LOOKUPVALUE('db_v_LookupSite'[SiteCode], 'db_v_LookupSite'[TerminalID], 'db_v_SalesProduct'[TerminalID])
   )
)

[Anonymous]

Oops! THis should do it:

Ordering Sites =
    COUNTROWS(
        SUMMARIZE('Sales',
        'Terminal'[SiteID]
        )
    )

[thorpyuk]

Hi EylesIT, there's no terminal table though...

[Anonymous]

Your table db_v_LookupSite holds the association between SiteCodes and TerminalIDs so you'll need to use that.

What is the primary key in db_v_LookupSite? I assume it is TerminalID, and db_v_LookupSite can have muiltiple rows for the same SiteCode (because I assume a Site can have >1 Terminal)?

Or is there only 1 row in db_v_LookupSite for each SiteCode, and each Site has only one TerminalID?

[thorpyuk]

Hi Eyles, i really appreciate you tracking back on this! Yes TerminalID is the primary key, and you are correct, each SiteCode exists multiple times on the 'db_v_LookupSite' table with multiple terminalIDs. The syntax below does evaluate, but returns the same result as DISTINCTCOUNT( 'db_v_SalesProduct'[TerminalId] ) as its counting the terminals still:

CountOrds = 
    COUNTROWS(
        SUMMARIZE(
        'db_v_SalesProduct',
     db_v_SalesProduct[TerminalID],
        "SiteCode", LOOKUPVALUE('db_v_LookupSite'[SiteCode], 'db_v_LookupSite'[TerminalID], 'db_v_SalesProduct'[TerminalID])
   )
)

[Anonymous]

Happy to help - I ask questions on here as well!

If TerminalID is the primary key, then db_v_LookupSite is can be a Terminal/Site/TerminalSite dimension table for the Sales fact table. Have you created a relationship between db_v_LookupSite and Sales on the TerminalID field?

[thorpyuk]

Hi Eyles, it's not my dataset, i'm only a consumer - i can create measures but can't see the underlying links.

It looks like TerminalID is the linked field - i can't see anything else that would be:

[Anonymous · Accepted solution]

You can create the relationship in the Model pane of in Power BI (see image).

If you are unable to create the relationship, then your measure will need to use the LOOKUPVALUE. Try this:

Ordering Sites = 
    COUNTROWS(
        SUMMARIZE(
            ADDCOLUMNS(
                'Sales',
                "SiteID", LOOKUPVALUE(Terminal[SiteID], Terminal[TerminalID], Sales[TerminalID])
            ),
            [SiteID]
        )
    )

[thorpyuk]

EylesIT, thank you so much! THat did work, with a bit of tweaking!

I've given you the Kudos, thanks again 🙂

[Anonymous]

Create a measure with this formula:

Ordering Sites = COUNTDISTINCT('Sales'[TerminalID])

Then add this measure to a table or matrix visual. When you also add ProdCode to the visual, the distinct count will be broken down by ProdCode.

[thorpyuk]

Hi EylesIT, thanks for your reply - that does give me unique terminals, but each site may have 3-4 different terminalID's... i wanted unique sites