CREATE TABLE table_name_93 (opponents VARCHAR, surface VARCHAR, date VARCHAR)

who is the opponents when the surface is clay and the date is 12 july 1992?
SELECT opponents FROM table_name_93 WHERE surface = "clay" AND date = "12 july 1992"
SELECT "opponents" FROM "table_name_93" WHERE "12 july 1992" = "date" AND "clay" = "surface"