Bill Pearson


Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 16: The DAX ALLEXCEPT() Function

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces the DAX ALLEXCEPT() function, discussing its syntax, uses and operation. He then provides hands-on exposure to ALLEXCEPT(), focusing largely upon its most popular use in removing filters from all columns in a table - except the filters we specify.

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2024-01-16 (first published: )

4,921 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 17: Time Intelligence Functions: The DAX DATEADD() Function

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces the DAX DATEADD() function, discussing its syntax, uses and operation. He then provides hands-on exposure to DATEADD(), focusing largely upon a popular use in creating prior-period values at multiple Date hierarchy levels.

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2024-01-16 (first published: )

2,675 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 18: Time Intelligence Dates Functions

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces five DAX Time Intelligence functions related to Dates: DATESBETWEEN(), DATESINPERIOD(), DATESMTD(), DATESQTD(), and DATESYTD(). He discusses the syntax, uses and operation of each, and then provides hands-on exposure to the functions in Power BI.

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2024-01-16 (first published: )

2,199 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 2: The DAX COUNTROWS() and FILTER() Functions

Bill Pearson, business intelligence architect and author, exposes the DAX COUNTROWS() and FILTER() functions, while generally exploring, comparing and contrasting the nature and operation of calculated columns and calculated measures, in the second Level of our Stairway to PowerPivot and DAX series.

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2024-01-16 (first published: )

23,725 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 20: Time Intelligence – Date Functions: ENDOFMONTH(), ENDOFQUARTER(), ENDOFYEAR()

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces three DAX Time Intelligence functions related to the End of Periods: ENDOFMONTH(), ENDOFQUARTER(), and ENDOFYEAR(). He discusses the syntax, uses and operation of each, and then provides hands-on exposure to the function in Power BI.

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2024-01-16 (first published: )

1,172 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 21: Time Intelligence – Dates Functions: FIRSTDATE() and LASTDATE()

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces two DAX Time Intelligence functions related to the Date: FIRSTDATE(), and LASTDATE(). He discusses the syntax, uses and operation of each function, and then provides hands-on exposure to it in Power BI.

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2024-01-16 (first published: )

5,112 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 22: Time Intelligence – Dates Functions: The DAX NEXT() Functions

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces four very similar DAX Time Intelligence functions related to Date: NEXTDAY(), NEXTMONTH(). NEXTQUARTER() and NEXTYEAR(). He discusses the syntax, uses and operation of each function, and then provides hands-on exposure to it in Power BI.

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2024-01-16 (first published: )

1,241 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 23: Time Intelligence – Dates Functions: The DAX PREVIOUS() Functions

Business Intelligence Architect, Analysis Services Maestro, and author Bill Pearson introduces four very similar DAX Time Intelligence functions related to Date: PREVIOUSDAY(), PREVIOUSMONTH(). PREVIOUSQUARTER() and PREVIOUSYEAR(). He discusses the syntax, uses and operation of each function, and then provides hands-on exposure to it in Power BI.

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2024-01-16 (first published: )

1,093 reads

Stairway to DAX and Power BI

Stairway to DAX and Power BI - Level 3: The DAX DISTINCT() Function and Basic Distinct Counts

Bill Pearson, Business Intelligence architect and author, exposes the DAX DISTINCT() function, and then provides some hands-on exposure to its use in generating distinct counts. Moreover, he further explores working with measures in the PivotTable in this, the third Level of our new Stairway to PowerPivot and DAX series.

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2024-01-16 (first published: )

11,477 reads

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Question of the Day

Fun with JSON I

I have some data in a table:

CREATE TABLE #test_data
(
    id INT PRIMARY KEY,
    name VARCHAR(100),
    birth_date DATE
);

-- Step 2: Insert rows  
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
     (
         SELECT t.* FROM #test_data AS t FOR JSON PATH
     )
             ) t;

See possible answers