Question: K P G 1 0 red 2 NULL red 3 0 blue 4 9 red 5 NULL blue Table T has 5 rows of 3
| K | P | G |
| 1 | 0 | red |
| 2 | NULL | red |
| 3 | 0 | blue |
| 4 | 9 | red |
| 5 | NULL | blue |
Table T has 5 rows of 3 columns of data as shown above, where NULL means no data. The query below
SELECT count(P) FROM T WHERE P IS NULL;
should result a number of
a.) 0
b.) 2 c.) NULL
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