Table:
0
A
B
C
D
E
1
id
network name
services
local authority
station
2
1
Amersham
Metropolitan line and Chiltern Railways
Chiltern
3
2
Bushey
London Overground and London Midland
Watford
4
3
Brentwood
Greater Anglia
Brentwood
5
4
Broxbourne
Greater Anglia
Broxbourne
6
5
Carpenders Park
London Overground
Three Rivers
7
6
Chafford Hundred
c2c
Thurrock
8
7
Chalfont & Latimer
Metropolitan line and Chiltern Railways
Chiltern
9
8
Chesham
Metropolitan line
Chiltern
10
9
Cheshunt
Greater Anglia
Broxbourne
11
10
Chorleywood
Metropolitan line and Chiltern Railways
Three Rivers
12
11
Croxley
Metropolitan line
Three Rivers

Questions and formulas:
Question: list the local authorities and services provided by all stations.
Formula: CHOOSE({1,2},D1,C1)
Formula2: CHOOSE({1,2},D2:D12,C2:C12)
Level: easy
Question: How many different services are provided by all stations?
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C12))
Level: easy
Question: Number of services of each station.
Formula: SUMMARIZE(E1,DCOUNTX(C1))
Formula2: SUMMARIZE(E2:E12,DCOUNTX(C2:C12))
Level: easy
Question: Show all local authorities, services and stations
Formula: UNIQUE(HSTACK(D1,C1,E1))
Formula2: UNIQUE(HSTACK(D2:D12,C2:C12,E2:E12))
Level: easy
Question: What are the local authorities, services and stations?
Formula: UNIQUE(HSTACK(D1,C1,E1))
Formula2: UNIQUE(HSTACK(D2:D12,C2:C12,E2:E12))
Level: easy