CREATE TABLE table_52227 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Save" CLOB, "Attendance" FLOAT, "Record" CLOB)

What was the Attendance on April 28?
SELECT SUM("Attendance") FROM table_52227 WHERE "Date" = 'april 28'
SELECT SUM("Attendance") FROM "table_52227" WHERE "Date" = 'april 28'