CREATE TABLE table_69063 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" CLOB, "Class" CLOB, "FCC info" CLOB)

Which call sign has a Class of A, and a Frequency MHz of 88.7?
SELECT "Call sign" FROM table_69063 WHERE "Class" = 'a' AND "Frequency MHz" = '88.7'
SELECT "Call sign" FROM "table_69063" WHERE "Class" = 'a' AND "Frequency MHz" = '88.7'