CREATE TABLE table_43444 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent in the final" CLOB, "Score" CLOB)

Which Surface is on 23 january 2011?
SELECT "Surface" FROM table_43444 WHERE "Date" = '23 january 2011'
SELECT "Surface" FROM "table_43444" WHERE "Date" = '23 january 2011'