Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Earn a 50% discount on the DP-600 certification exam by completing the Fabric 30 Days to Learn It challenge.

Reply
SuzieKidd
Frequent Visitor

SQL to DAX

How do I write the following SQL in DAX please

 

DATEADD(s,-1,DATEADD(mm,0,DATEADD(mm,DATEDIFF(mm,0,GETDATE()),0)))

 

Thank you

1 ACCEPTED SOLUTION
smpa01
Super User
Super User

@SuzieKidd 

 

 

select DATEADD(s,-1,DATEADD(mm,0,DATEADD(mm,DATEDIFF(mm,0,DATEFROMPARTS(2023,8,15)),0)))

 

 

returns

 

 

2023-07-31 23:59:59.000

 

 

You need DAX like this

 

 

Column = 
VAR dt = DATE(2023,8,15)
VAR yr = YEAR(dt)
VAR mo = MONTH(dt)
VAR date2 = DATE(yr,mo,1)
RETURN (date2-1)+0.99999

or 

Column = 
VAR dt = DATE(2023,8,15)
VAR yr = YEAR(dt)
VAR mo = MONTH(dt)
VAR date2 = DATE(yr,mo,1)
RETURN (date2-1)+CONVERT(TIME(23,59,59),DOUBLE)

 

 

 

smpa01_0-1675790584176.png

replace GETTODAY() with TODAY() in DAX

Why 0.99999 works here I have no idea,

@AlexisOlson  do you know why it works? Can we achieve that part through a calculation rather than hardcoding

 

Did I answer your question? Mark my post as a solution!
Proud to be a Super User!
My custom visualization projects
Plotting Live Sound: Viz1
Beautiful News:Viz1, Viz2, Viz3
Visual Capitalist: Working Hrs

View solution in original post

5 REPLIES 5
smpa01
Super User
Super User

@SuzieKidd 

 

 

select DATEADD(s,-1,DATEADD(mm,0,DATEADD(mm,DATEDIFF(mm,0,DATEFROMPARTS(2023,8,15)),0)))

 

 

returns

 

 

2023-07-31 23:59:59.000

 

 

You need DAX like this

 

 

Column = 
VAR dt = DATE(2023,8,15)
VAR yr = YEAR(dt)
VAR mo = MONTH(dt)
VAR date2 = DATE(yr,mo,1)
RETURN (date2-1)+0.99999

or 

Column = 
VAR dt = DATE(2023,8,15)
VAR yr = YEAR(dt)
VAR mo = MONTH(dt)
VAR date2 = DATE(yr,mo,1)
RETURN (date2-1)+CONVERT(TIME(23,59,59),DOUBLE)

 

 

 

smpa01_0-1675790584176.png

replace GETTODAY() with TODAY() in DAX

Why 0.99999 works here I have no idea,

@AlexisOlson  do you know why it works? Can we achieve that part through a calculation rather than hardcoding

 

Did I answer your question? Mark my post as a solution!
Proud to be a Super User!
My custom visualization projects
Plotting Live Sound: Viz1
Beautiful News:Viz1, Viz2, Viz3
Visual Capitalist: Working Hrs

@smpa01 You're subtracting a day and then adding back almost a whole day.

 

(1-0.99999) days = 0.000001 days = 0.864 seconds.

 

So, essentially, you're taking midnight on the first of the month and subtracting roughly one second.

 

Since this is in the Power Query forum, I'd recommend

Date.StartOfMonth(DateTime.LocalNow()) - #duration(0,0,0,1)

 

In DAX, I'd recommend

EOMONTH ( TODAY(), -1 ) + TIME ( 23, 59, 59 )

 

Thank you I'll have a play with this.

Daryl-Lynch-Bzy
Resident Rockstar
Resident Rockstar

Hi @SuzieKidd - Could you please explain what you are trying to achieve with this formula? 

Please note that the DAX DATEADD function does not support seconds, minutes and hours like its SQL cousin.  You may consider using the add duration functionality in Power Query, or add a DAX functions that convert datetime to seconds (a bit like UNIX Timestamp).

Thank you

Helpful resources

Announcements
LearnSurvey

Fabric certifications survey

Certification feedback opportunity for the community.

PBI_APRIL_CAROUSEL1

Power BI Monthly Update - April 2024

Check out the April 2024 Power BI update to learn about new features.

April Fabric Community Update

Fabric Community Update - April 2024

Find out what's new and trending in the Fabric Community.

Top Solution Authors
Top Kudoed Authors