Table:
0
A
B
C
D
E
F
G
1
City
System
Category
Daily ridership
As of
Opened
Stations
2
Vancouver, BC
SkyTrain (Vancouver)
ICTS
354,000
2009
1985
47
3
Toronto , Ontario
Toronto streetcar system
Streetcar
275,200
4Q2009
1861
N/A
4
Calgary, Alberta
C-Train
Light rail
269,600
2012
1981
44
5
Edmonton, Alberta
Edmonton LRT
Light rail
93,600
2010
1978
15
6
Toronto , Ontario
Scarborough RT
ICTS
42,250
2009
1985
6
7
Ottawa, Ontario
O-Train
Diesel light rail
12,200
4Q2009
2001
5

Questions and formulas:
Question: Which Opened has a System of c-train, and a Daily ridership smaller than 269,600?
Formula: LET(query1,LET(query1,FILTER(A1:G1,B1="c-train"),SUMMARIZE(CHOOSECOLS(query1,6),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)<269600))
Formula2: LET(query1,LET(query1,FILTER(A2:G7,B2:B7="c-train"),SUMMARIZE(CHOOSECOLS(query1,6),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)<269600))
Level: hard
Question: Which Stations are in vancouver, bc?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,A1="vancouver, bc"),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,A2:A7="vancouver, bc"),7))
Level: medium
Question: Which category has 5 stations?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,G1=5),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,G2:G7=5),3))
Level: medium
Question: Which Opened has a Category of diesel light rail?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="diesel light rail"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,C2:C7="diesel light rail"),6))
Level: medium