Table:
0
A
B
C
D
E
F
G
H
I
J
1
problem log id
assigned to staff id
problem id
problem category code
problem status code
log entry date
log entry description
log entry fix
other log details
2
1
11
11
Middleware
Solved
2011-03-13 13:11:57
t
k
p
3
2
11
8
GUI
Solved
1976-03-31 14:03:02
a
k
s
4
3
12
1
GUI
Solved
1974-12-11 01:06:22
b
j
e
5
4
12
12
GUI
Reported
1993-04-02 11:07:29
a
t
b
6
5
6
12
Middleware
Reported
1976-09-17 09:01:12
c
n
u
7
6
2
13
GUI
Solved
1983-07-01 02:12:36
h
g
n
8
7
13
1
Datatabase
Solved
1974-09-13 00:37:26
s
c
v
9
8
4
15
Datatabase
Solved
1999-08-17 00:00:18
j
h
j
10
9
10
13
GUI
Reported
1993-06-21 22:33:35
p
i
f
11
10
6
1
Middleware
Reported
2001-05-14 10:03:53
d
x
d
12
11
1
8
Datatabase
Solved
1973-03-12 16:30:50
w
k
a
13
12
4
10
Middleware
Solved
1997-08-31 08:19:12
c
y
c
14
13
6
10
Middleware
Reported
2009-04-10 19:09:30
q
t
o
15
14
8
4
Datatabase
Reported
2011-11-12 23:30:53
a
s
c
16
15
5
7
GUI
Reported
1982-11-17 06:05:52
v
o
d

Questions and formulas:
Question: No.10 problem record.
Formula: FILTER(A1:J1, C1=10)
Formula2: FILTER(A2:J16, C2:C16=10)
Level: easy
Question: log entry descriptions, problem ids and problem log ids
Formula: UNIQUE(HSTACK(A1,G1,C1))
Formula2: UNIQUE(HSTACK(A2:A16,G2:G16,C2:C16))
Level: easy
Question: the log entry description, problem id and problem log id
Formula: UNIQUE(HSTACK(A1,G1,C1))
Formula2: UNIQUE(HSTACK(A2:A16,G2:G16,C2:C16))
Level: easy