CREATE TABLE table_name_19 (roll VARCHAR2, name VARCHAR2, decile VARCHAR2)

Name the total number of roll for st joseph's school when decile is less than 5
SELECT COUNT(roll) FROM table_name_19 WHERE name = "st joseph's school" AND decile < 5
SELECT COUNT("roll") FROM "table_name_19" WHERE "decile" < 5 AND "name" = "st joseph's school"