Table:
0
A
B
C
D
E
1
city
airport code
airport name
country
country abbrev
2
Anthony
AKO
Alton
3
Aberdeen

Questions and formulas:
Question: List the airport code and name in the city of Anthony.
Formula: CHOOSE({1,2},FILTER(B1,A1="Anthony"),FILTER(C1,A1="Anthony"))
Formula2: CHOOSE({1,2},FILTER(B2:B3,A2:A3="Anthony"),FILTER(C2:C3,A2:A3="Anthony"))
Level: medium
Question: Give the airport code and airport name corresonding to the city Anthony.
Formula: CHOOSE({1,2},FILTER(B1,A1="Anthony"),FILTER(C1,A1="Anthony"))
Formula2: CHOOSE({1,2},FILTER(B2:B3,A2:A3="Anthony"),FILTER(C2:C3,A2:A3="Anthony"))
Level: medium
Question: How many airports do we have?
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B3))
Level: easy
Question: Return the number of  airports.
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B3))
Level: easy
Question: Which city and country is the Alton airport at?
Formula: CHOOSE({1,2},FILTER(A1,C1="Alton"),FILTER(D1,C1="Alton"))
Formula2: CHOOSE({1,2},FILTER(A2:A3,C2:C3="Alton"),FILTER(D2:D3,C2:C3="Alton"))
Level: medium
Question: Give the city and country for the Alton airport.
Formula: CHOOSE({1,2},FILTER(A1,C1="Alton"),FILTER(D1,C1="Alton"))
Formula2: CHOOSE({1,2},FILTER(A2:A3,C2:C3="Alton"),FILTER(D2:D3,C2:C3="Alton"))
Level: medium
Question: What is the airport name for airport 'AKO'?
Formula: FILTER(C1,B1="AKO")
Formula2: FILTER(C2:C3,B2:B3="AKO")
Level: easy
Question: Return the name of the airport with code 'AKO'.
Formula: FILTER(C1,B1="AKO")
Formula2: FILTER(C2:C3,B2:B3="AKO")
Level: easy
Question: What are airport names at City 'Aberdeen'?
Formula: FILTER(C1,A1="Aberdeen")
Formula2: FILTER(C2:C3,A2:A3="Aberdeen")
Level: easy
Question: What are the names of airports in Aberdeen?
Formula: FILTER(C1,A1="Aberdeen")
Formula2: FILTER(C2:C3,A2:A3="Aberdeen")
Level: easy
Question: the city and country where alton is located and its code
Formula: LET(query1,FILTER(A1:E1,C1="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Formula2: LET(query1,FILTER(A2:E3,C2:C3="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Level: hard
Question: The city, country, and code of Alton airport
Formula: LET(query1,FILTER(A1:E1,C1="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Formula2: LET(query1,FILTER(A2:E3,C2:C3="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Level: hard
Question: The name of the airport which has the code AKO.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ako"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,B2:B3="ako"),3))
Level: medium
Question: Name of the airport which has the code AKO.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ako"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,B2:B3="ako"),3))
Level: medium
Question: Name of each airport in Aberdeen.
Formula: LET(query1,FILTER(A1:E1,A1="aberdeen"),UNIQUE(CHOOSECOLS(query1,3,2)))
Formula2: LET(query1,FILTER(A2:E3,A2:A3="aberdeen"),UNIQUE(CHOOSECOLS(query1,3,2)))
Level: hard
Question: Which airport is located in Aberdeen?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="aberdeen"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,A2:A3="aberdeen"),2))
Level: medium
Question: Codes and names of each airport in Anthony.
Formula: LET(query1,FILTER(A1:E1,A1="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Formula2: LET(query1,FILTER(A2:E3,A2:A3="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Level: hard
Question: The codes and names of Anthony's airports 
Formula: LET(query1,FILTER(A1:E1,A1="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Formula2: LET(query1,FILTER(A2:E3,A2:A3="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Level: hard
Question: the number of airports
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B3))
Level: easy
Question: How many airports are there?
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B3))
Level: easy
Question: the codes and names of airports of Anthony
Formula: LET(query1,FILTER(A1:E1,A1="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Formula2: LET(query1,FILTER(A2:E3,A2:A3="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Level: hard
Question: The codes and names of the airports located in Anthony.
Formula: LET(query1,FILTER(A1:E1,A1="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Formula2: LET(query1,FILTER(A2:E3,A2:A3="anthony"),UNIQUE(CHOOSECOLS(query1,2,3)))
Level: hard
Question: How many airports?
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B3))
Level: easy
Question: The city, country and code of airport Alton 
Formula: LET(query1,FILTER(A1:E1,C1="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Formula2: LET(query1,FILTER(A2:E3,C2:C3="alton"),UNIQUE(CHOOSECOLS(query1,1,4,2)))
Level: hard
Question: the name of the airport whose code is AKO
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ako"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,B2:B3="ako"),3))
Level: medium
Question: the name of airport with code AKO
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ako"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,B2:B3="ako"),3))
Level: medium
Question: the names of airports in Aberdeen
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="aberdeen"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E3,A2:A3="aberdeen"),3))
Level: medium