Table:
0
A
B
C
D
E
F
1
order id
customer id
order status
date order placed
order details
2
1
2
Shipped
2009-02-21 15:26:19
3
2
11
Shipped
1974-06-24 22:10:26
4
3
4
Shipped
1982-12-29 21:10:11
5
4
15
Packing
1974-08-10 08:15:16
6
5
5
Packing
2010-06-08 02:20:49
7
6
7
Packing
1975-12-23 15:59:43
8
7
15
Packing
1976-09-01 09:27:00
9
8
10
On Road
1997-01-27 19:12:01
10
9
3
On Road
1983-09-08 12:32:49
11
10
2
On Road
1982-12-09 09:42:23
12
11
9
On Road
1979-12-07 02:03:49
13
12
2
On Road
1976-01-18 08:09:12
14
13
15
On Road
2002-12-06 14:13:30
15
14
10
On Road
2002-09-13 07:38:09
16
15
8
On Road
1971-05-10 01:54:18

Questions and formulas:
Question: List all distinct orders ordered by placed date
Formula: SORT(UNIQUE(HSTACK(D1,A1)), 1, 1)
Formula2: SORT(UNIQUE(HSTACK(D2:D16,A2:A16)), 1, 1)
Level: medium
Question: Order ids in ascending order of order placed dates
Formula: SORT(UNIQUE(HSTACK(A1,D1)), 2, 1)
Formula2: SORT(UNIQUE(HSTACK(A2:A16,D2:D16)), 2, 1)
Level: medium
Question: Order ids by their placed dates in chronological order.
Formula: SORT(UNIQUE(HSTACK(A1,D1)), 2, 1)
Formula2: SORT(UNIQUE(HSTACK(A2:A16,D2:D16)), 2, 1)
Level: medium