Table:
0
A
B
C
D
E
F
G
H
I
J
1
asset id
maintenance contract id
supplier company id
asset details
asset make
asset model
asset acquired date
asset disposed date
other asset details
assets
2
1
2
2
dell laptop1
PT
58 ub
2017-12-25 00:31:27
2018-03-14 10:50:00
3
2
14
1
dell laptop2
IN
35 xt
2018-01-27 00:59:46
2018-03-20 04:24:09
4
3
7
2
dell laptop3
IT
63 ok
2017-09-07 08:13:15
2018-03-08 20:50:40
Bad condition
5
4
11
5
dell laptop4
RU
69 uv
2017-06-12 17:37:19
2018-03-16 05:46:55
6
5
8
5
dell laptop5
DE
90 oq
2017-07-21 16:03:19
2018-02-27 18:59:07
7
6
8
6
monitor1
CN
91 ub
2017-04-22 12:33:39
2018-03-10 11:11:43
8
7
6
6
monitor2
CN
27 du
2017-07-18 01:22:58
2018-03-20 22:45:00
9
8
15
7
monitor3
GB
94 kg
2017-10-24 04:29:17
2018-02-28 18:14:13
Bad condition
10
9
12
13
machine1
RU
07 yt
2017-04-16 12:19:25
2018-03-08 18:42:41
11
10
2
2
machine2
FR
20 tl
2017-09-19 16:15:45
2018-03-06 20:36:14
12
11
7
12
machine3
FR
11 wi
2017-11-25 05:04:20
2018-03-17 00:51:14
13
12
13
14
machine4
RU
95 vn
2017-09-26 14:05:46
2018-02-27 23:12:03
Bad condition
14
13
11
8
system1
DE
08 yy
2017-12-20 14:05:17
2018-03-07 20:35:19
Bad condition
15
14
10
6
system2
IN
66 xm
2017-10-19 02:54:52
2018-03-22 23:48:15
16
15
6
11
system3
IE
24 ak
2017-12-18 19:21:11
2018-02-27 02:37:16

Questions and formulas:
Question: List the asset id, details, make and model for every asset.
Formula: CHOOSE({1,2,3,4},A1,D1,E1,F1)
Formula2: CHOOSE({1,2,3,4},A2:A16,D2:D16,E2:E16,F2:F16)
Level: easy
Question: What are all the distinct asset models?
Formula: UNIQUE(F1)
Formula2: UNIQUE(F2:F16)
Level: easy
Question: List the all the assets make, model, details by the disposed date ascendingly.
Formula: SORTBY(CHOOSE({1,2,3},E1,F1,D1),H1,1)
Formula2: SORTBY(CHOOSE({1,2,3},E2:E16,F2:F16,D2:D16),H2:H16,1)
Level: easy
Question: the asset id, asset details, asset made countries, asset model and assets
Formula: UNIQUE(HSTACK(A1,D1,E1,F1,J1))
Formula2: UNIQUE(HSTACK(A2:A16,D2:D16,E2:E16,F2:F16,J2:J16))
Level: easy
Question: total number of asset models
Formula: ROWS(UNIQUE(F1))
Formula2: ROWS(UNIQUE(F2:F16))
Level: easy
Question: Models, fabricate countries and details of assets in chronological order of disposed dates.
Formula: SORT(UNIQUE(HSTACK(F1,E1,D1,J1,H1)), 5, 1)
Formula2: SORT(UNIQUE(HSTACK(F2:F16,E2:E16,D2:D16,J2:J16,H2:H16)), 5, 1)
Level: medium
Question: the number of asset models
Formula: ROWS(UNIQUE(F1))
Formula2: ROWS(UNIQUE(F2:F16))
Level: easy
Question: Models, fabricate countries and details of assets from earliest disposed date to latest. 
Formula: SORT(UNIQUE(HSTACK(E1,F1,D1,H1)), 4, 1)
Formula2: SORT(UNIQUE(HSTACK(E2:E16,F2:F16,D2:D16,H2:H16)), 4, 1)
Level: medium