Table:
0
A
B
C
D
E
F
G
H
I
1
incident id
incident type code
student id
date incident start
date incident end
incident summary
recommendations
other details
behavior incident
2
1
NOISE
6
2017-07-09 10:04:13
2018-03-08 14:08:54
3
2
DISTURB
13
2018-01-31 10:51:13
2018-03-18 18:40:05
4
3
VIOLENCE
1
2017-10-10 22:43:54
2018-03-22 02:10:35
Transfer schools
5
4
VIOLENCE
10
2017-07-20 17:43:50
2018-03-09 06:28:44
6
5
NOISE
7
2017-08-13 22:15:05
2018-02-25 05:38:58
7
6
VIOLENCE
8
2017-06-09 18:32:28
2018-03-20 10:32:10
8
7
VIOLENCE
4
2017-04-23 07:03:17
2018-03-19 02:35:39
9
8
DISTURB
1
2017-05-02 12:52:09
2018-03-18 01:23:29
10
9
NOISE
11
2017-06-19 14:25:54
2018-03-08 09:36:36
11
10
NOISE
1
2018-01-27 09:24:45
2018-03-13 05:18:05
12
11
VIOLENCE
9
2018-03-06 21:03:58
2018-03-06 14:44:37
Transfer schools
13
12
DISTURB
7
2017-08-27 03:21:30
2018-03-02 16:06:34
14
13
VIOLENCE
5
2017-05-25 15:02:53
2018-03-10 21:12:22
15
14
NOISE
1
2017-08-29 20:48:56
2018-03-16 14:37:20
Transfer schools
16
15
NOISE
15
2018-02-05 13:13:45
2018-03-08 09:00:48

Questions and formulas:
Question: How many distinct incident type codes are there?
Formula: ROWS(UNIQUE(B1))
Formula2: ROWS(UNIQUE(B2:B16))
Level: easy