如何在 Google Sheet 公式和自动填充中写入最新记录？

Question

I have a Google sheet - table 1 below and all the data is given. Table 1 data is people(VenderNo) claim that they want to join event with what data(EventStartDate) and what booth number(BoothNo). So the data is duplicated because people update it with new line and never allowd to delete or update the existing record(table 1).

enter image description here

And I also have a Google sheet - table 2 below and only EventStartDate and BoothNo are given. All I want to do is the result like table 2's VenderNo. The purpose of table 2 is trying to summarize which vendor is eventually joining the event with latest booth number.

Ideal result like blow:

enter image description here

May I know how to write this formula in table 2 column C (VendorNo) with autofill function like ={ "VendorNo"; unique(General:A2?A) } without hand dragging the formula?

Any thoughts and thank you.

PS: I am sorry I couldn't post image above directly because I don't have enough reputation.

Answer 1

You don't need a Formula for that. Just select your columns and go to "Data" ->"Sort data"->"advanced sort settings" and then sort by column "EventStartDate" and secondly add sort by another column and add "BoothNo". In the end you can run a data clean up to remove duplicates. You find it also under data.

Answer 2

to get the latest update from your table 1 you can use:

=SORTN(SORT(A2:C, B2:B, 0), 9^9, 2, 1, 1)

for your table 2 try:

={"VN"; INDEX(IFNA(VLOOKUP(E2:E&F2:F, 
 SORTN(SORT({B2:B&C2:C, A2:C}, B2:B, 0), 9^9, 2, 2, 1), 2, 0)))}

Answer 3

Try

={"vendor v2";arrayformula(iferror(
if(E2:E9&"~"&F2:F9=vlookup(E2:E9&"~"&RIGHT(F2:F9,2),sort(arrayformula({B2:B6&"~"&RIGHT(C2:C6,2),B2:B6&"~"&C2:C6,B2:B6,C2:C6,A2:A6}),2,0),2,0),
vlookup(E2:E9&"~"&RIGHT(F2:F9,2),sort(arrayformula({B2:B6&"~"&RIGHT(C2:C6,2),B2:B6&"~"&C2:C6,B2:B6,C2:C6,A2:A6}),2,0),5,0),)))}