Generate Unique ID in Power Query (M Code) or Power Power Pivot (DAX Code)

[Suyheng]

Hi Everyone,

Could anyone help me to write M or Dax Code to generate Unique ID as shown below

Old ID	New ID	Item	Unique ID
	1	ATN1	3
1	2	ATN2	3
2	3	ATN3	3

Many thanks for your help.

Regards,

Heng

[TomMartens]

Hey,

can you please describe the rule how the "Unique ID" has to be rerived, and also I do not understand what makes the ID unique if it repeats 3 times.

Regards 

[Suyheng]

Hi TomMartens,

For example, customer buy house No1 but later they change to House No2 and later on they change to House No3 but the revenue already paid in house No1 and House No 2. Thus I want to sum all the revenue for House No3 which I need to have the same ID in order for me to sum up the revenue

Input:

Old ID	New ID	Customer	Item	Status	Revenue	New
	1	CustomerA	House No1	Inactive	5000	3
1	2	CustomerA	House No2	Inactive	10000	3
2	3	CustomerA	House No3	Active	20000	3

Output: M or Dax code to show this result

Old ID	New ID	Customer	Item	Status	Revenue	New
2	3	CustomerA	House No3	Active	35000	3

Many thanks for help

[TomMartens]

Hey,

so what you are saying is this:

• the column "New" gets its value from the "latest" (maximum) value of column "New ID"
• create a measure "overall revenues" and just display the value if the latest "New ID" is selected

Is my understaning of your requirement correct?

Regards

[Suyheng]

Hi TomMartens,

Yes. but we need to know the related contract based on the new and the old ID.

I have many customers that change the house and this example I just showing 2 customers.

Thus, how to write the M or Dax code to generate column " New"

Input

Old ID	New ID	Customer	Item	Status	Revenue	New
	20	CustomerA	House No1	Inactive	5000	30
20	25	CustomerA	House No2	Inactive	10000	30
25	30	CustomerA	House No3	Active	20000	30
	60	CustomerB	House NoB	Inactive	20000	80
60	65	CustomerB	House NoC	Inactive	10000	80
65	80	CustomerB	House NoD	Active	30000	80

Output:

Old ID	New ID	Customer	Item	Status	Revenue	New
	30	CustomerA	House No3	Active	35000	30
65	80	CustomerB	House NoD	Active	60000	80

Sorry for any inconvenince cause for my bad writing

Many thanks,

Regards,

Heng

[TomMartens]

Hey,

here is a little Power BI file I created three measures (should work the same in Power Pivot)

This measure identifies the last New ID (the status is active)

New = 
IF(HASONEVALUE('Table1'[Customer])
	,CALCULATE(
        FIRSTNONBLANK('Table1'[New ID], 1)
        ,ALLEXCEPT('Table1',Table1[Customer])
        ,'Table1'[Status] = "Active"
    )
	,BLANK()
)

I created measures to determine the corresponding Old ID and New ID where the Status is active

Old ID calc = 
IF(HASONEVALUE(Table1[Customer]), 
	MAXX(VALUES('Table1'[Old ID]),
		IF(MAX('Table1'[New ID]) = [New]
			,CALCULATE(
				MAX('Table1'[Old ID])
				,ALLEXCEPT('Table1',Table1[Customer])
			)
		,BLANK()
		)
	),
BLANK()
)

and

New ID calc = 
IF(HASONEVALUE(Table1[Customer]), 
	MAXX(VALUES('Table1'[New ID]),
		IF(MAX('Table1'[New ID]) = [New]
			,CALCULATE(
				MAX('Table1'[New ID])
				,ALLEXCEPT('Table1',Table1[Customer])
			)
		,BLANK()
		)
	),
BLANK()
)

and finally a measure that adds up all the revenues from each customer

Revenue total = 
CALCULATE( 
	SUMX(VALUES('Table1'[Customer]),
		
			CALCULATE(
				SUM(Table1[Revenue])
				,ALLEXCEPT('Table1',Table1[Customer])
			
		)
	)
)

These measures create the following output

Hope this is what you are looking for

Regards

[Suyheng]

Hi TomMartens,

Thanks for your valuable time helping me.

Your measure is already working for customer but if I put the item it shows below result

 

but if I want to show the same output as my previous email

Output:

Old ID	New ID	Customer	Item	Status	Revenue	New
25	30	CustomerA	House No3	Active	35000	30
65	80	CustomerB	House NoD	Active	60000	80

Many thanks again

Regards,

Heng

[TomMartens · Accepted solution]

Hey,

just adjust the measure New like so

New = 
var New = 
IF(HASONEVALUE('Table1'[Customer])
	,CALCULATE(
        FIRSTNONBLANK('Table1'[New ID], 1)
        ,ALLEXCEPT('Table1',Table1[Customer])
        ,'Table1'[Status] = "Active"
    )
	,BLANK()
)
return
IF(HASONEVALUE('Table1'[Customer])
	,IF(VALUES(Table1[New ID]) = New
		,New
		,BLANK()
	)
)

and the measure Revenue total like so

Revenue total = 
var New = 
IF(HASONEVALUE('Table1'[Customer])
	,CALCULATE(
        FIRSTNONBLANK('Table1'[New ID], 1)
        ,ALLEXCEPT('Table1',Table1[Customer])
        ,'Table1'[Status] = "Active"
    )
	,BLANK()
)
return
IF(HASONEVALUE('Table1'[Customer])
	,IF(VALUES(Table1[New ID]) = [New]
		,CALCULATE( 
			SUMX(VALUES('Table1'[Customer]),	
				CALCULATE(
					SUM(Table1[Revenue])
					,ALLEXCEPT('Table1',Table1[Customer])
				)
			)
		)
		,BLANK()
	)
	,CALCULATE( 
			SUMX(VALUES('Table1'[Customer]),	
				CALCULATE(
					SUM(Table1[Revenue])
					,ALLEXCEPT('Table1',Table1[Customer])
				)
			)
		)
)

Then the output will look like this

Regards

[Suyheng]

Hi Martens,

Now it is working. Thank you

Have a nice day!

Regards,

Heng