Find the first value by category - dax - powerbi

Question

I'm trying to find out how to choose first and last date and quantity for each category, here ORDER_LINE_RELEASE_NO.
ORDER_LINE_RELEASE_NO
WANTED_DATE_OLD
WANTED_DATE_NEW
BUY_QTY_DUE_OLD
BUY_QTY_DUE_NEW
49562_1_9
27.01.2022
1
49562_1_9
27.01.2022
27.01.2022
1
2660
50081_1_1
31.01.2022
6
50081_1_1
31.01.2022
31.03.2022
6
6
50081_1_1
31.03.2022
31.03.2022
6
1210
50084_1_1
10.02.2022
1
50084_1_1
10.02.2022
10.03.2022
1
1
50084_1_1
10.03.2022
10.06.2022
1
1
50084_2_1
10.02.2022
60
50084_2_1
10.02.2022
08.04.2022
60
60
52370_1_1
13.05.2022
3000
52370_1_1
13.05.2022
13.05.2022
3000
2000
In this original table I have the same ORDER_LINE_RELEASE_NO in more rows and I would like to "summarize" it like in the second table here:
ORDER_LINE_RELEASE_NO
FIRST_DATE
LAST_DATE
ORIGINAL_QTY
LAST_WANTED_QTY
49562_1_9
27.01.2022
27.01.2022
1
2660
50081_1_1
31.01.2022
31.03.2022
6
1210
50084_1_1
10.02.2022
10.06.2022
1
1
50084_2_1
10.02.2022
08.04.2022
60
60
52370_1_1
13.05.2022
13.05.2022
3000
2000
So basically in the column FIRST_DATE we have the first value from column WANTED_DATE_NEW (for each category), in LAST_DATE the last value from WANTED_DATE_NEW, in ORIGINAL_QTY is the first value from BUY_QTY_DUE_NEW and in LAST_WANTED_QTY we have the last value from BUY_QTY_DUE_NEW.
I tried to use FIRSTNONBLANK and LASTNONBLANK functions, but they only work fot dates, not for all quantity - for example for 52370_1_1 quantity.
My code in creating new table from another in powerBI was:
PURCH_ORD_LINE_UNIQUE =
ADDCOLUMNS (
DISTINCT ( PURCH_ORD_LINE_ARCH[ORDER_LINE_RELEASE_NO] ),
"FIRST_DATE",
CALCULATE (
FIRSTNONBLANK (
PURCH_ORD_LINE_ARCH[WANTED_DATE_NEW],
PURCH_ORD_LINE_ARCH[WANTED_DATE_NEW]
),
ALLEXCEPT ( PURCH_ORD_LINE_ARCH, PURCH_ORD_LINE_ARCH[ORDER_LINE_RELEASE_NO] )
),
"LAST_DATE",
CALCULATE (
LASTNONBLANK (
PURCH_ORD_LINE_ARCH[WANTED_DATE_NEW],
PURCH_ORD_LINE_ARCH[WANTED_DATE_NEW]
),
ALLEXCEPT ( PURCH_ORD_LINE_ARCH, PURCH_ORD_LINE_ARCH[ORDER_LINE_RELEASE_NO] )
),
"ORIGINAL_QTY",
CALCULATE (
FIRSTNONBLANK (
PURCH_ORD_LINE_ARCH[BUY_QTY_DUE_NEW],
PURCH_ORD_LINE_ARCH[BUY_QTY_DUE_NEW]
)
),
"LAST_WANTED_QTY",
CALCULATE (
LASTNONBLANK (
PURCH_ORD_LINE_ARCH[BUY_QTY_DUE_NEW],
PURCH_ORD_LINE_ARCH[BUY_QTY_DUE_NEW]
)
)
)
Sorry if my question is too stupid, I'm quite new to DAX and PowerBI.
Thanks for any answer.
Tomas

Answer 1

here is my solution : (i will share the sample file at the end, so you can easily understand my approach)
First we will add an index column to the table :
#"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 1, 1, Int64.Type)
then, we will add grouped index number column :
Group Ranking =
RANKX (
FILTER (
'Table',
EARLIER ( 'Table'[ORDER_LINE_RELEASE_NO ] ) = 'Table'[ORDER_LINE_RELEASE_NO ]
),
'Table'[Index],
,
ASC,
DENSE
)
finally, we create our table :
Modelling --> New Table
Result Table =
ADDCOLUMNS (
SUMMARIZE ( 'Table', 'Table'[ORDER_LINE_RELEASE_NO ] ),
"FIRST_DATE", CALCULATE ( MIN ( 'Table'[WANTED_DATE_OLD ] ) ),
"LAST_DATE", CALCULATE ( MAX ( 'Table'[WANTED_DATE_new ] ) ),
"ORIGINAL_QTY",
VAR _max =
CALCULATE (
MIN ( 'Table'[Group Ranking] ),
ALLEXCEPT ( 'Table', 'Table'[ORDER_LINE_RELEASE_NO ] ),
NOT ( ISBLANK ( 'Table'[BUY_QTY_DUE_OLD ] ) )
)
RETURN
CALCULATE (
FIRSTNONBLANK ( 'Table'[BUY_QTY_DUE_OLD ], 1 ),
ALLEXCEPT ( 'Table', 'Table'[ORDER_LINE_RELEASE_NO ] ),
'Table'[Group Ranking] = _max
),
"LAST_WANTED_QTY",
VAR _max =
CALCULATE (
MAX ( 'Table'[Group Ranking] ),
ALLEXCEPT ( 'Table', 'Table'[ORDER_LINE_RELEASE_NO ] )
)
RETURN
CALCULATE (
SUM ( 'Table'[BUY_QTY_DUE_NEW] ),
ALLEXCEPT ( 'Table', 'Table'[ORDER_LINE_RELEASE_NO ] ),
'Table'[Group Ranking] = _max
)
)
Here is the sample PBix File for you...