Question

I need to do a query to count instances of different values and group them.

SELECT COUNT(*), Type FROM Table GROUP BY Type

The values for Type can be C, V, and I – but I want it to consider any values that are I to be V.

So:
C = C
V = V
I = V

How can I do this in a query?

Answer 1

Compute a field that is equivelent. The below CASE statement will take “I”, make it “V” and leave everything else alone.

SELECT COUNT(*), CASE Type WHEN "I" THEN "V" ELSE Type END as NewType
FROM Table 
GROUP BY CASE Type WHEN "I" THEN "V" ELSE Type END