CREATE TABLE table_name_57 (caps INT, date_of_birth__age_ VARCHAR)

What is the total of Caps when player born 13 December 1977?
SELECT SUM(caps) FROM table_name_57 WHERE date_of_birth__age_ = "13 december 1977"
SELECT SUM("caps") FROM "table_name_57" WHERE "13 december 1977" = "date_of_birth__age_"