CREATE TABLE table_7318 ("Outcome" CLOB, "Date" FLOAT, "Tournament" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponent in the final" CLOB, "Score in the final" CLOB)

What is the earliest Date David Adams played on a Clay Surface with Brett Steven as Partner?
SELECT MIN("Date") FROM table_7318 WHERE "Surface" = 'clay' AND "Partner" = 'brett steven'
SELECT MIN("Date") FROM "table_7318" WHERE "Partner" = 'brett steven' AND "Surface" = 'clay'