CREATE TABLE table_name_99 (decile NUMBER, area VARCHAR2, roll VARCHAR2)

What is the total decile in the area of Normanby with a roller smaller than 157?
SELECT SUM(decile) FROM table_name_99 WHERE area = "normanby" AND roll < 157
SELECT SUM("decile") FROM "table_name_99" WHERE "area" = "normanby" AND "roll" < 157