Need help with Data Cleansing

[Anonymous]

Hey guys,

I need to do some data cleansing and I'm not really sure if this topic needs to be posted here at Power Query or at Dax.
I have a table containing the following columns:
Personeel.In-/Extern
Uren Registratie 2.CategorieID
WBS Code
Klantnum.

I need to 'overwrite' the value of Uren Registratie 2.CategorieID (which is 1) with the following logic:
IF Personeel.In-/Extern = "Extern" AND
WBS Code = "731/7011.01" AND
Klantnum. is empty
THEN 
Uren Registratie 2.CategorieID = 6

Should I do this in Power Query or use Dax?
How can I do this?

With kind regards,

Lazzanova

[Anonymous]

You are totally right... Best close this topic before I feel more ashamed 😄
Anyway Vijay thank you very much for your time! Much appreciated!

[Vijay_A_Verma · Accepted solution]

For overwriting the values, DAX can't be used. For this purpose, you will need to use PQ.

See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test (later on when you use the query on your dataset, you will have to change the source appropriately. If you have columns other than these, then delete Changed type step and do a Changed type for complete table from UI again)

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wcq0oSS3KU9JRMgJic2NDfXMDQ0M9IAZyDZVidXCrAPLA8okpKSlAtjFI1ghZ1ggsbWIMhECeCYZuI0LGA+2PBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Personeel.In-/Extern" = _t, #"Uren Registratie 2.CategorieID" = _t, #"WBS Code" = _t, #"Klantnum." = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Personeel.In-/Extern", type text}, {"Uren Registratie 2.CategorieID", Int64.Type}, {"WBS Code", type text}, {"Klantnum.", Int64.Type}}),
    Custom1 = Table.ReplaceValue(#"Changed Type", each [Uren Registratie 2.CategorieID], each if  [#"Personeel.In-/Extern"] = "Extern" and [WBS Code] = "731/7011.01" and [#"Klantnum."] =null then 6 else [Uren Registratie 2.CategorieID], Replacer.ReplaceValue,{"Uren Registratie 2.CategorieID"})
in
    Custom1

[Anonymous]

The code you've posted here results in this query:

Not really sure why these values exist.

[Vijay_A_Verma]

My source is a sample one, just for example. I need some sample data from your side to check on this. Also point out which value should have changed. 

[Anonymous]

Here is some sample data. I've deleted other columns.
See row 17: The value of 1 needs to change to 6.
(Because Klantnum. = empty / null) and WBS Code = 713/7011.01 and Personeel.In-/Extern = Extern (It shows null in PQ)

Row Nr.	Klantnum.	Personeel.Naam	WBS Code	Uren Registratie 2.CategorieID	Personeel.In-/Extern
1	1305030220	Önder Kandemir	713/7011.01	1	Extern
2	1305030211	Önder Kandemir	713/7011.01	1	Extern
3	1305030177	Önder Kandemir	713/7011.01	1	Extern
4	1305030228	Önder Kandemir	713/7011.01	1	Extern
5	1305030178	Önder Kandemir	713/7011.01	1	Extern
6	1305030019	Önder Kandemir	713/7011.01	1	Extern
7	1305030024	Önder Kandemir	713/7011.01	1	Extern
8	1305030195	Önder Kandemir	713/7011.01	1	Extern
9	1305030229	Önder Kandemir	713/7011.01	1	Extern
10	1305030120	Önder Kandemir	713/7011.01	1	Extern
11	1301020560	Önder Kandemir	713/7011.01	1	Extern
12	1305030171	Önder Kandemir	713/7011.01	1	Extern
13	1305030018	Önder Kandemir	713/7011.01	1	Extern
14	1305030120	Önder Kandemir	7040	6	Extern
15	1305030120	Önder Kandemir	7005	3	Extern
16	1305030191	Önder Kandemir	713/7011.01	1	Extern
17		Önder Kandemir	713/7011.01	1	Extern
18		Önder Kandemir	7045	3	Extern
19		Önder Kandemir	7005	3	Extern

[Vijay_A_Verma]

In your original requirement, you gave WBS Code=731/7011.01 whereas in your table, value is 713 not 731....Hence, in the code also, you will need to replace 731/7011.01 with 713/7011.01. Hence, following would work

= Table.ReplaceValue(#"Added Custom", each [Uren Registratie 2.CategorieID], each if [#"Personeel.In-/Extern"] = "Extern" and [WBS Code] = "713/7011.01" and [#"Klantnum."] =null then 6 else [Uren Registratie 2.CategorieID], Replacer.ReplaceValue,{"Uren Registratie 2.CategorieID"})

[Anonymous]

Hey Vijay,

Thanks for the quick response. I tried doing what you have suggested, but failed in doing so.
But I did try adding another step in PQ:

I've copy pasted then the last part of your code:
= Table.ReplaceValue(#"Namen van kolommen gewijzigd2", each [Uren Registratie 2.CategorieID], each if [#"Personeel.In-/Extern"] = "Extern" and [WBS Code] = "731/7011.01" and [#"Klantnum."] =null then 6 else [Uren Registratie 2.CategorieID], Replacer.ReplaceValue,{"Uren Registratie 2.CategorieID"})

I thought this would change the values of the table of the previous step, but it didn't. What am I doing wrong here?

With kind regards,

Lazzanova

[Vijay_A_Verma]

I am not sure whether your Klantnum. column is null or blanks. You can try following

= Table.ReplaceValue(#"Namen van kolommen gewijzigd2", each [Uren Registratie 2.CategorieID], each if [#"Personeel.In-/Extern"] = "Extern" and [WBS Code] = "731/7011.01" and ([#"Klantnum."] =null or [#"Klantnum."] ="") then 6 else [Uren Registratie 2.CategorieID], Replacer.ReplaceValue,{"Uren Registratie 2.CategorieID"})

[Anonymous]

The column has nulls, so the previous code would be correct. However, upon checking if the values have changed, I don't see any changes made. 
If I would have had a typo regarding the column names, an error message would appear.
But that is also not the case. I can't explain why the values are not changing.