CREATE TABLE table_name_95 (decile VARCHAR2, years VARCHAR2, roll VARCHAR2)

How many deciles have Years of 1 8, and a Roll of 49?
SELECT COUNT(decile) FROM table_name_95 WHERE years = "1–8" AND roll = 49
SELECT COUNT("decile") FROM "table_name_95" WHERE "1–8" = "years" AND "roll" = 49