MSPowerBI: Difference between revisions

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* https://docs.microsoft.com/de-de/power-bi/guidance/star-schema
* https://docs.microsoft.com/de-de/power-bi/guidance/star-schema
* There are three different options on how your data should be treated: Import, DirectQuery, or Live Connection. This section will focus specifically on the Import option.
* There are three different options on how your data should be treated: Import, DirectQuery, or Live Connection. This section will focus specifically on the Import option.
====Power Query====
Power Query is for Load and Transform the data.
Eine Power Query '''benutzerdefinierte Funktion''' ist eine Zuordnung aus einem Satz von Eingabewerten zu einem einzelnen Ausgabewert und wird aus nativen M-Funktionen und -Operatoren erstellt.
Transform column modifies the original column, add column does not touch the original column(s).
=====M Language=====
M ist eine funktionale Sprache:
* [[File:Screenshot 2024-04-21 150340.png|400px]]
* Der gesamte Code ist in Schritte unterteilt, die alle innerhalb eines Let-in-Statements definiert sind
* Jeder Schritt hat einen Namen, z. B. Quelle, oder auch #"Geänderter Typ"
* Schritte bauen zumeist (aber nicht zwangsläufig) aufeinander auf. Daher sieht man es häufig, dass der Name eines Schrittes im darauffolgenden Schritt innerhalb der Funktionen benutzt wird
* Derjenige Schritt, der nach dem in benannt ist (letzte Zeile im Skript), stellt das Ergebnis der gesamten Abfrage da. Das Ergebnis dieses Schrittes wird dem Nutzer – zumeist, aber nicht notwendigerweise – als Tabelle zurückgegeben.


====Relationsships====
====Relationsships====
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Calculated measures [[File:PowerBI_29.PNG|40px]] are very different than calculated columns. Calculated measures are not static, and operate within the current filter context of a report; therefore, calculated measures are dynamic and ever-changing as the filter context changes. Calculated measures can do the following:
=====DAX Studio=====
* They can be assigned to any table
* They interact with all the relationships in the data model automatically, unlike calculated columns.
* They are not materialized in a column, and therefore cannot be validated in the Data View.
 
=====Filter Context=====
Der Filterkontext beschreibt die Filter, die während der Auswertung eines Measures oder eines Measureausdrucks angewandt werden. Filter können direkt auf Spalten angewandt werden. Darüber hinaus können Filter auch indirekt angewandt werden. Dies passiert immer dann, wenn Filter durch Modellbeziehungen an andere Tabellen weitergegeben werden.
 
======Change of the Filter Context======
Es gibt zwei mögliche Standardergebnisse, wenn Sie der CALCULATE-Funktion Filterausdrücke hinzufügen:
* Wenn sich die Spalten (oder Tabellen) nicht im Filterkontext befinden, werden dem Filterkontext neue Filter hinzugefügt, um den CALCULATE-Ausdruck auszuwerten.
* Wenn sich die Spalten (oder Tabellen) bereits im Filterkontext befinden, werden die vorhandenen Filter durch neue Filter überschrieben, um den CALCULATE-Ausdruck auszuwerten.
 
CALCULATE(<EXPRESSION>, [<FILTER>*])
 
======ALL======
* removes all filter
* https://radacad.com/how-to-use-all-in-a-dax-expression-in-power-bi Many examples to ignore  filter by specific slicers or other visuals or in total
 
======FILTER======
The following definitions are equivalent
Revenue Red = CALCULATE([Revenue], 'Product'[Color] = "Red")
Revenue Red = CALCULATE([Revenue],
    FILTER(
        'Product',
        'Product'[Color] = "Red"
    )
)
 
======REMOVEFILTERS======
 
=====Examples=====
* https://www.enjoysharepoint.com/power-bi-measure-examples/ examples
* avoid blank values
Menge UH = IF(
    ISBLANK(SUM(CostCenterRawData[Menge])),
    0,
    SUM(CostCenterRawData[Menge]))
 
Full Productive Capacity = CALCULATE(
    COUNT(Employees[Chargeability]), ALL(CostCenterRawData), Employees[Practice] IN ALLSELECTED(CostCenterRawData[N-2]), Employees[Legal_company] = "EDT", Employees[Chargeability] = 1.0)
Partly Productive Capacity = CALCULATE(
    COUNT(Employees[Chargeability]), ALL(CostCenterRawData), Employees[Practice] IN ALLSELECTED(CostCenterRawData[N-2]), Employees[Legal_company] = "EDT", Employees[Chargeability] < 1.0, Employees[Chargeability] > 0.0)
 
All Utilization Hours = CALCULATE('CostCenterRawData'[Utilization Hours], REMOVEFILTERS(CostCenterRawData[ES Activity]))
 
=====[[DAX|DAX]]=====
* https://www.powerbi-pro.com/calculate-das-schweizer-armeemesser-in-dax/
======DAX Studio======
* https://towardsdatascience.com/handling-blank-in-power-bi-90eed948d042
* https://towardsdatascience.com/handling-blank-in-power-bi-90eed948d042
===Data Types===
* In PowerBI there are [https://learn.microsoft.com/en-us/power-bi/connect-data/desktop-data-types data types] and data formats
** Dates
** Numbers
*** Whole Numbers
*** Fixed Decimals
*** Decimal Numbers (most commonly used)
** Text
===Views===
* [[File:PowerBI_5.PNG|100px]]
** Report View (Berichtsansicht)
** Data View (Datenansicht)
** Relationship View (Beziehungsansicht)


==Operation==
==Operation==
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* delete rows above headers (e.g. filter sums) by [[File:PowerBI_3.PNG|400px]]
* delete rows above headers (e.g. filter sums) by [[File:PowerBI_3.PNG|400px]]
* set first row as header line by [[File:PowerBI_4.PNG|400px]]
* set first row as header line by [[File:PowerBI_4.PNG|400px]]
=====Delete Columns=====
* delete columns not needed by right click -> delete
=====Add Columns=====
=====Add Columns=====
* see https://docs.microsoft.com/de-de/power-bi/transform-model/desktop-tutorial-create-calculated-columns
* see https://docs.microsoft.com/de-de/power-bi/transform-model/desktop-tutorial-create-calculated-columns

Latest revision as of 10:26, 3 September 2024

Information[edit]

  • extension for local saves is *.pbix

Concepts[edit]

Relationsships[edit]

Import aspects are:

  • Auto-detected relationships
  • There may be only one active relationship between two tables
  • There may be an unlimited number of in-active relationships between two tables
  • Relationships may only be built on a single column, not multiple columns
  • Relationships automatically filter from the one side of the relationship to the many side Relationships cannot be built directly between tables that have a many-to-many relationship
  • Cross-Filtering means a filter from a 1-to-many and many-to-1 relationship like filter on one dimension table to filter another dimension table via a fact table

The arrows defines the direction of filtering:

Hierachies[edit]
Modelling Organizational Hierachies[edit]

Calculated Columns[edit]

ES Activity Order = RELATED('ES Activity Order'[ES Activity Order])

Measures[edit]

DAX Studio[edit]

Operation[edit]

Import Data from Excel[edit]

General Information[edit]

Power Query Editor always works with a preview of the data, to make the development process fast. When you load the data in Power BI, transformations will be applied on the entire dataset. Hence errors might have not been identified before the full import of data.


Steps[edit]

Define Import[edit]
  • select import and file
  • select transform (not load)
Delete Rows e.g. Header[edit]
  • delete rows above headers (e.g. filter sums) by
  • set first row as header line by
Add Columns[edit]

= Table.AddColumn(#"Geänderter Typ", "Charge Fact", each if Value.Is([#"Chargeability (FTE)#(lf)"], type number) then [#"Chargeability (FTE)#(lf)"] else 1)


= Table.AddColumn(#"Geänderter Typ2", "Activity Type", each if [#"Partner-PSP-Element"] = "9914.P10048.004" then "ES Admin" else if [#"Partner-PSP-Element"] = "9914.P10048.005" then "ES Training" else if [#"Partner-PSP-Element"] = "9914.P10048.006" then "ES Relationship Management" else "tbd")


= Table.AddColumn(#"Renamed Columns1", "Initials", each Text.Start([First Name], 1) & Text.Start([Last Name], 1))

Delete Rows[edit]
  • filter specific value (click to right down arrow in the column header and define the filter)
N charactors from left[edit]
  • next step delete the rows to the right
  • rename column to the original name (w/o .1 suffix)
Adjust Query[edit]
Not summing up a column like personnel number[edit]
Error Handling[edit]
  • example see here
  • remove all rows with an error in one column
  • remove all rows with an error in any column
  • replace errors in one column -> Replace Errors

Export Data to Excel[edit]

  • move or right click in header
  • select dots
  • select export data


Relationsships[edit]

Change Default Summarization[edit]


Visuals[edit]

General Properties[edit]

  • border

Filter on Visuals[edit]

Show Selection Pane for Grouping[edit]

  • you need to select at least 2 visuals to have the context menu 'group'
  • to avoid overlapping visuals put them in different groups

Sorting according to Values[edit]

  • Enter Data and give the table a name
    • if needed edit the data by which opens Power Query
    • select
    • creating columns and enter data
  • Create Relationship
  • Create new Sort Column with e.g. 
ES Activity Order = RELATED(ES_Activity_Order[ES Activity Order])
  • set this column as sort column by

Slicer[edit]

  • Selection Behavior

Matrix[edit]

Mulit-Row Card[edit]

  • Title On/Off: caption of multi-row card on top
  • Visual Data -> Fields -> Right Click -> Rename for this visual: text below number
  • Visual Data -> Category Label On/Off: show text below number
  • Visual Data -> Category Label: format of text below number

Pie Chart[edit]

  • sequence of fields defines the position, starts at 00:00
  • Format -> Visual -> Legend -> Position
  • Format -> Visual -> Slices -> Colors

Single Card[edit]

  • 'Collout value' -> Font: size of number
  • 'Category label' on/off: text below number
  • 'Title': text above number

Stacked Bar Chart[edit]

  • figures in bar by switching on 'data label'
  • bar char width by spacing -> Inner Padding
  • colors

100% Stacked Column Chart[edit]

  • zoom slider

Stacked Column Chart[edit]

  • show 0 values
Table[edit]
Show Duplicates[edit]

Projects[edit]

ES KPI Reporting[edit]

  • Table for Activity Sorting: Report View -> Enter Data -> ... and edit it via these steps

English/German[edit]

Slicer Datenschnitt
E1 G1
E2 G2
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