Question

What I have:

• A table with distinct professor’s name, quarter, and year values.
• A table with the professor’s name, quarter, year, and a student’s grade.

What I need to do is get the count of each type of grade (e.g. A, B, C) without regard to the + or – signs.

Does anyone know how I would accomplish this?

Answer 1

As you did not say anything special regarding the output I will only output the grade and the how often it was found:

SELECT SUBSTRING(grade, 1, 1), count(SUBSTRING(grade, 1, 1))
  FROM grades
 GROUP BY SUBSTRING(grade, 1, 1)