Join tables in google sheet - full join

问题

I have two tables in google spreadsheet. They have a common unique identifier (Account id). Now I need to join these tables into a third table containing all rows from both tables.

Please have a look at this sheet:

or follow the link to an example spreadsheet: https://docs.google.com/spreadsheets/d/17ka2tS5ysXqJnrpCxCTwNmCsTORPFP1Gatq4p1fPldA/edit?usp=sharing

I have manage to join the tables using this arrayformula:

=ARRAYFORMULA({G3:H8,VLOOKUP(G3:G8,{A3:A7,B3:C7},{2,3},false)})

But with this formula the joined table "misses" two rows:

20  N/A Klaus   Berlin
4   VW  David   Paris

The first missing row is found only in Table 1. The second missing has an ID that is found in Table 2 and has two (2) matching ID's in Table2, but only one row in the joined table

Is there a way to provide a formula that can handle this?

回答1:

previous answer is incorrect. use:

=ARRAYFORMULA(QUERY(UNIQUE(IFNA({G2:H10, 
 VLOOKUP(G2:G10, A2:C10, {2, 3}, 0);
 VLOOKUP({A3:A10; G3:G10}, {G3:H10; {A3:A10, IF(A3:A10, )}}, {1, 2}, 0), {B3:C10; 
 VLOOKUP(G3:G10, {A3:C10; {G3:G10, IF(G3:G10, ), IF(G3:G10, )}}, {2, 3}, 0)}})), 
 "where Col1 is not null order by Col1", 1))

回答2:

Formula

=ArrayFormula(UNIQUE({
VLOOKUP({A3:A7;G3:G8},{G3:H8;{A3:A7,IF(A3:A7,)}},{1,2},FALSE),
{B3:C7;VLOOKUP(G3:G8,{A3:C7;{G3:G8,IF(G3:G8,),IF(G3:G8,)}},{2,3},FALSE)}
}))

Result

Explanation

• {A3:A7;G3:G8} creates a list of all the account ids (it includes duplicates)
• {G3:H8;{A3:A7,IF(A3:A7,)} creates an array having three columns with values from Table 2 and blanks for ids from Table 1
• {A3:C7;{G3:G8,IF(G3:G8,),IF(G3:G8,)}} creates an array having three columns with values from Table 1 and blanks for ids from Table 2
• The first vlookup populates the first two columns (account id and car)
• {B3:C7;VLOOKUP(G3:G8,{A3:C7;{G3:G8,IF(G3:G8,),IF(G3:G8,)}},{2,3},FALSE)} populates the third and fourth columns (name and city)
• UNIQUE removes duplicates

Related

• Google spreadsheet "=QUERY" join() equivalent function?

来源：https://stackoverflow.com/questions/62641416/join-tables-in-google-sheet-full-join