Hello!
Could you please help with the simple question.
The result of the query (groupping) is the list of numbers and letters, example:
1
1
A
1
A
A
1
If we will count all this data, we will have 6 as result of COUNT(). But the target is to count not all the data, but count data after appearing the first letter "A".
So, we need that the COUNT() function will work and count just from the first "A" in the list. The result should be 4 (counting not from first row, but from 3rd , from first "A")
Explain please, how can we do it?
