Forum Discussion
Record Changes
I need to identify recorders that have been changed so that they can be flagged, something like below the table.
the data come from a table containing rolling 90 days record
| Date | Ref | Status | Status changed |
| 1/02/2017 | 1 | A | 0 |
| 2/02/2017 | 1 | A | 0 |
| 3/02/2017 | 1 | B | 1 |
| 1/02/2017 | 2 | A | 0 |
| 2/02/2017 | 2 | V | 1 |
| 3/02/2017 | 2 | A | 1 |
Hi Sir_night,
It's obviously there is an order of "Date" for a "Ref" in your scenario. So let's sort the data first, then add an index to keep the orders. Finally, we just need to compare "Status" between "index" and "index + 1".
1. Open "Query Editor", do "Sort Ascending" of "Ref", then do "Sort Ascending" of "Date". There will be two arrows. (blue rectangle). Please don't break the order of ordering. "Ref" first, "Date" second.
2. Add an index.
3. Add a calculated column.
Status changed = VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) RETURN IF ( ISBLANK ( NextStatus ), 0, IF ( 'Table1'[Status] = NextStatus, 0, 1 ) )Best Regards!
Dale
Hi David,
It would be a little complicated.
Method 1: Add a new column, tag the previous record only. (depend on [Status changed])
Status changed = VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) RETURN IF ( ISBLANK ( NextStatus ), 0, IF ( 'Table1'[Status] = NextStatus, 0, 1 ) )Method 2: there are four statuses here. (independant)
0 isn't changed and isn't previous
1 changed and isn't previous
2 isn't changed and previous
3 changed and previous
StatusFlag = VAR LastStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) + 1 ) ) RETURN IF ( ISBLANK ( LastStatus ) && 'Table1'[Status] = NextStatus, 0, IF ( ISBLANK ( LastStatus ) && 'Table1'[Status] <> NextStatus, 2, IF ( ISBLANK ( NextStatus ) && 'Table1'[Status] = lastStatus, 0, IF ( ISBLANK ( NextStatus ) && 'Table1'[Status] <> lastStatus, 1, IF ( 'Table1'[Status] = NextStatus && 'Table1'[Status] = lastStatus, 0, IF ( 'Table1'[Status] = lastStatus && 'Table1'[Status] <> NextStatus, 2, IF ( 'Table1'[Status] <> lastStatus && 'Table1'[Status] <> NextStatus, 3 ) ) ) ) ) ) )Best Regards!
Dale
4 Replies
- v-jiascu-msftMicrosoft Employee
Hi Sir_night,
It's obviously there is an order of "Date" for a "Ref" in your scenario. So let's sort the data first, then add an index to keep the orders. Finally, we just need to compare "Status" between "index" and "index + 1".
1. Open "Query Editor", do "Sort Ascending" of "Ref", then do "Sort Ascending" of "Date". There will be two arrows. (blue rectangle). Please don't break the order of ordering. "Ref" first, "Date" second.
2. Add an index.
3. Add a calculated column.
Status changed = VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) RETURN IF ( ISBLANK ( NextStatus ), 0, IF ( 'Table1'[Status] = NextStatus, 0, 1 ) )Best Regards!
Dale
- Sir_nightFrequent Visitor
Hi Dale
is there any way to modify this to mark both the changed record and the prevouse record
thanks for your help
David
- v-jiascu-msftMicrosoft Employee
Hi David,
It would be a little complicated.
Method 1: Add a new column, tag the previous record only. (depend on [Status changed])
Status changed = VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) RETURN IF ( ISBLANK ( NextStatus ), 0, IF ( 'Table1'[Status] = NextStatus, 0, 1 ) )Method 2: there are four statuses here. (independant)
0 isn't changed and isn't previous
1 changed and isn't previous
2 isn't changed and previous
3 changed and previous
StatusFlag = VAR LastStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) - 1 ) ) VAR NextStatus = CALCULATE ( VALUES ( Table1[Status] ), FILTER ( ALL ( 'Table1' ), 'Table1'[Ref] = EARLIER ( Table1[Ref] ) && 'Table1'[Index] = EARLIER ( Table1[Index] ) + 1 ) ) RETURN IF ( ISBLANK ( LastStatus ) && 'Table1'[Status] = NextStatus, 0, IF ( ISBLANK ( LastStatus ) && 'Table1'[Status] <> NextStatus, 2, IF ( ISBLANK ( NextStatus ) && 'Table1'[Status] = lastStatus, 0, IF ( ISBLANK ( NextStatus ) && 'Table1'[Status] <> lastStatus, 1, IF ( 'Table1'[Status] = NextStatus && 'Table1'[Status] = lastStatus, 0, IF ( 'Table1'[Status] = lastStatus && 'Table1'[Status] <> NextStatus, 2, IF ( 'Table1'[Status] <> lastStatus && 'Table1'[Status] <> NextStatus, 3 ) ) ) ) ) ) )Best Regards!
Dale
- vanessafvgCommunity Champion
Sir_night do you have a status change date, to be honest that would be your best bet is have some sort of indicator when its changed.
Power bi is not really a database, its a data visualisation tool, so doing this sort of thing is better done at source or with the right data coming into the model.
In a real world scenario you would need to snapshot the data in order to compare old to new.