CREATE TABLE table_name_6 (shirt_no INT, birth_date VARCHAR, weight VARCHAR)

Birth Date of 8 November 1980, and a Weight smaller than 93 has what sum of a shirt number?
SELECT SUM(shirt_no) FROM table_name_6 WHERE birth_date = "8 november 1980" AND weight < 93
SELECT SUM("shirt_no") FROM "table_name_6" WHERE "8 november 1980" = "birth_date" AND "weight" < 93