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Anonymous
Not applicable

## Count purchases after another purchase

Hello everybody,

I've got a table like:

id | timestamp | uid | tariff_name |

1    16.01.2017   id001  tariff_A

2    16.01.2017   id002  tariff_A

3    17.01.2017   id001  tariff_B

4    18.01.2017   id002  tariff_C

5    18.01.2017   id003  tariff_A

How can i count: all purchases for id001 made after purchasing tariff_A ? (1 purchase for example table)

sum of id that purchase smth after purchasing tariff_A? (2 (id001 & id002 id for example table)

3 REPLIES 3
Resolver IV

hi @Anonymous

you could do a calc column like this

```CntLaterPurchases =
CALCULATE(
COUNTROWS(
FILTER(
table,
AND( table[uid] = EARLIER(table[UID]), table[id] > EARLIER(table[id]) )
)
)
)```

HTH,

Frank

Anonymous
Not applicable

hi @BetterCallFrank thanks for reply, i've got the following error: "EARLIER/EARLIEST refers to an earlier row context which doesn't exist", what can i do wrong?)

And what about if the first purchase was tariff_B, then tariff_A, and then tariff_C - i need to count only tariff_C - is it possible with your suggestion?

Resolver IV

Hi @Anonymous

for your first question, try this measure:

```Cnt Later Purchase of Customer:=IF( HASONEVALUE(Table1[uid] ),
VAR TheUID = VALUES( Table1[uid] )
VAR TheID = MAX( Table1[id] )
RETURN
COUNTROWS(
FILTER(
ALL( Table1 ), AND( Table1[uid] = TheUID, Table1[id] > TheID )
)
)
)```

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