Table:
0
A
B
C
D
E
F
1
orchestra id
orchestra
conductor id
record company
year of founded
major record format
2
1
London Symphony Orchestra
1
Mercury Records
2003
CD
3
2
Columbia Symphony Orchestra
2
Columbia Masterworks
2009
CD / LP
4
3
Royal Concertgebouw Orchestra
3
Philips
2008
CD
5
4
Royal Danish Orchestra
4
Kultur
2002
DVD
6
5
Detroit Symphony Orchestra
5
Decca Records
2002
CD
7
6
Montreal Symphony Orchestra
6
Decca Records
2004
CD
8
7
Seattle Symphony Orchestra
7
Delos Records
2002
CD
9
8
Chicago Symphony Orchestra
8
Deutsche Grammophon
2003
CD
10
9
Kirov Orchestra
9
Philips Classics Records
2008
CD
11
10
Philharmonia Orchestra
10
Koch Records / Naxos Records
2006
CD
12
11
Orchestre de Paris
11
EMI
2007
CD
13
12
San Francisco Symphony Orchestra
12
RCA
2008
CD

Questions and formulas:
Question: Please show the different record companies and the corresponding number of orchestras.
Formula: SUMMARIZE(D1,DCOUNTX(B1))
Formula2: SUMMARIZE(D2:D13,DCOUNTX(B2:B13))
Level: easy
Question: How many orchestras does each record company manage?
Formula: SUMMARIZE(D1,DCOUNTX(B1))
Formula2: SUMMARIZE(D2:D13,DCOUNTX(B2:B13))
Level: easy
Question: Please show the record formats of orchestras in ascending order of count.
Formula: SORT(SUMMARIZE(F1,DCOUNTX(B1)), 2, 1)
Formula2: SORT(SUMMARIZE(F2:F13,DCOUNTX(B2:B13)), 2, 1)
Level: medium
Question: List the record company shared by the most number of orchestras.
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(B1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D13,DCOUNTX(B2:B13)), 2, -1), 1)
Level: hard
Question: What is the record company used by the greatest number of orchestras?
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(B1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D13,DCOUNTX(B2:B13)), 2, -1), 1)
Level: hard
Question: Find the number of orchestras whose record format is "CD" or "DVD".
Formula: ROWS(FILTER(A1,(F1="CD")+(F1="DVD")))
Formula2: ROWS(FILTER(A2:A13,(F2:F13="CD")+(F2:F13="DVD")))
Level: easy
Question: Count the number of orchestras that have CD or DVD as their record format.
Formula: ROWS(FILTER(A1,(F1="CD")+(F1="DVD")))
Formula2: ROWS(FILTER(A2:A13,(F2:F13="CD")+(F2:F13="DVD")))
Level: easy
Question: How many orchestras does record company have? 
Formula: SUMMARIZE(D1,DCOUNTX(B1))
Formula2: SUMMARIZE(D2:D13,DCOUNTX(B2:B13))
Level: easy
Question: the number of orchestras for different record companies
Formula: SUMMARIZE(D1,DCOUNTX(B1))
Formula2: SUMMARIZE(D2:D13,DCOUNTX(B2:B13))
Level: easy
Question: major record formats sorted by orchestra number in ascending order
Formula: SORT(SUMMARIZE(F1,DCOUNTX(B1)), 2, 1)
Formula2: SORT(SUMMARIZE(F2:F13,DCOUNTX(B2:B13)), 2, 1)
Level: medium
Question: The record company chosen by the most orchestras.
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(B1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D13,DCOUNTX(B2:B13)), 2, -1), 1)
Level: hard
Question: Which record company have the most orchestras collaborated with?
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(B1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D13,DCOUNTX(B2:B13)), 2, -1), 1)
Level: hard
Question: How many orchestras choose to record in CD or DVD?
Formula: ROWS(UNIQUE(FILTER(B1, (F1="cd")+(F1="dvd"))))
Formula2: ROWS(UNIQUE(FILTER(B2:B13, (F2:F13="cd")+(F2:F13="dvd"))))
Level: medium
Question: the number of orchestras whose record format is CD or DVD
Formula: ROWS(UNIQUE(FILTER(B1, (F1="dvd")+(F1="cd"))))
Formula2: ROWS(UNIQUE(FILTER(B2:B13, (F2:F13="dvd")+(F2:F13="cd"))))
Level: medium
Question: How many orchestras for different record companies?
Formula: SUMMARIZE(D1,DCOUNTX(B1))
Formula2: SUMMARIZE(D2:D13,DCOUNTX(B2:B13))
Level: easy
Question: the increasing order of orchestra's number for different major record formats
Formula: SORT(SUMMARIZE(F1,DCOUNTX(B1)), 2, 1)
Formula2: SORT(SUMMARIZE(F2:F13,DCOUNTX(B2:B13)), 2, 1)
Level: medium
Question: The record company which the most orchestras choose to collaborate with.
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(B1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D13,DCOUNTX(B2:B13)), 2, -1), 1)
Level: hard