I am drawing a major blank here. Please help me out. Here's my scenerio:
************************
| Column A | Column B |
| A | C |
| A | D |
| A | E |
| A | F |
| A | G |
| A | H |
| B | C |
| B | D |
| B | E |
| B | F |
| B | G |
| B | H |
| C | C |
| C | D |
| C | E |
| C | F |
| C | H |
| C | I |
| D | C |
| D | D |
| D | I |
| E | G |
************************
I need to get a count of all the values in column A that have BOTH a 'F' AND a 'G' in column B. My Result in this scenario should be a 2 (A and B have BOTH F and G -- C and D do not).
I also need to get a count of all the values in A that have ONLY a 'G' in column B. My Result in the scenario should be a 1 (A and B both have a 'G', but they have other values as well. E ONLY has a 'G'.)
The only thing I can come up with is the following -- I am sure I am WAY off the mark on this one:
SELECT COUNT(C.A)
FROM (
SELECT C.A
FROM T
WHERE C.B = 'F'
OR C.B = 'G'
GROUP BY C.A
HAVING COUNT(*) > 1
) AS CNT
You shoud chech for distinct Bs
SELECT COUNT(*) As CountOfAs
FROM (
SELECT C.A
FROM T
WHERE C.B = 'F'
OR C.B = 'G'
GROUP BY C.A
HAVING COUNT(DISTINCT(B)) > 1
) AS CNT
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