Extract correct Max/Min Values

[cobdeng]

I have a Sharepoint List which contains Locations and data input times - as below.

Location	Date
FH	20/10/2016 00:00
FH	20/10/2016 12:00
FF	20/10/2016 01:00
FF	20/10/2016 10:00
FF	20/10/2016 11:00
GCC	20/10/2016 00:00
GCC	20/10/2016 12:00
JC	20/10/2016 00:00
JC	20/10/2016 12:00
MH	20/10/2016 01:00
MH	20/10/2016 12:00
ML	20/10/2016 00:00
ML	20/10/2016 12:00
NV	20/10/2016 00:00
NV	20/10/2016 12:00

Within Power BI I need to be able to identify - as a Calculated Column - the Maximum and Minimum Dates per Location so it looks like the below

Location	Date	Loc Min Date	Loc Max Date
FH	20/10/2016 00:00	20/10/2016 00:00	20/10/2016 12:00
FH	20/10/2016 12:00	20/10/2016 00:00	20/10/2016 12:00
FF	20/10/2016 01:00	20/10/2016 01:00	20/10/2016 11:00
FF	20/10/2016 10:00	20/10/2016 01:00	20/10/2016 11:00
FF	20/10/2016 11:00	20/10/2016 01:00	20/10/2016 11:00
GCC	20/10/2016 00:00	20/10/2016 00:00	20/10/2016 12:00
GCC	20/10/2016 12:00	20/10/2016 00:00	20/10/2016 12:00
JC	20/10/2016 00:00	20/10/2016 00:00	20/10/2016 12:00
JC	20/10/2016 12:00	20/10/2016 00:00	20/10/2016 12:00
MH	20/10/2016 01:00	20/10/2016 01:00	20/10/2016 12:00
MH	20/10/2016 12:00	20/10/2016 01:00	20/10/2016 12:00
ML	20/10/2016 00:00	20/10/2016 00:00	20/10/2016 12:00
ML	20/10/2016 12:00	20/10/2016 00:00	20/10/2016 12:00
NV	20/10/2016 00:00	20/10/2016 00:00	20/10/2016 12:00
NV	20/10/2016 12:00	20/10/2016 00:00	20/10/2016 12:00

Is anybody able to assist as I am currently struggling as this is all very new to me

Thanks

[ankitpatira]

@cobdeng In pbi desktop go to query editor and under Transform tab use Group By as below image.

[cobdeng]

Not sure that will give me the right answers as there is other data as well apart from the dates

[v-micsh-msft]

Hi cobdeng,

In addition to what suggested by ankitpatira, we could also take a try with the method below:

1. First sort the table by Location in Power BI Desktop, this would bring all the same location together,

2. Under Modeling Tab, click Add a column,  with the following formula:

MinDate = minx(
                  filter(Sheet1, Sheet1[Location]=earlier(Sheet1[Location])), 
                  Sheet1[Date] )

3. Click the Add a column again, with the formula below:

MaxDate = maxx(
                  filter(Sheet1, Sheet1[Location]=earlier(Sheet1[Location])), 
                  Sheet1[Date] )

4. Check my testing result:

If you need any further assistance on this, please post back.

Regards

[cobdeng]

Thanks Michael_Shao

Nearly, but not quite as we can have multiple dates/times as per the screenshot below

Where there are multiple dates/times, I need to identify the maximum and minimum date time on each individual date, so, for location 2 in the above, on 19/10/2016 both max and min should be 19/10/2016 11:00 but on 20/10/2016 minimum should be 20/10/2016 01:00 and the maximum 20/10/2016 11:00.  For location 4, on 19/10/2016 min/max should be 19/10/2016 00:00 - 19/10/2016 12:00, and on 20/10/2016  min/max should be 20/10/2016 00:00 - 20/10/2016 12:00.

Thanks in advance

[v-micsh-msft · Accepted solution]

Hi cobdeng,

This could be done by the following ways.

We need to create another column (Or create another date table, then create the relationship between the date table and main tbale) to help calculate.

YMD = format('Table'[ReportDate], "yyyy-mm-dd")

Then add this column in earlier calculated column, for example:

MaxDate = maxx(
                  filter(Sheet1, And(Sheet1[Location]=earlier(Sheet1[Location]),

                                                Sheet1[YMD]=earlier(Sheet1[YMD])),
                  Sheet1[Date] )

Check to see if this would work.

Regards

[cobdeng]

Thanks Michael_Shao

That worked (save for a missing close bracket!!)

Many thanks