CREATE TABLE table_name_15 (opponents VARCHAR2, edition VARCHAR2, against VARCHAR2)

Who were the opponents during the 2006 fed cup europe/africa group ii against greece?
SELECT opponents FROM table_name_15 WHERE edition = "2006 fed cup europe/africa group ii" AND against = "greece"
SELECT "opponents" FROM "table_name_15" WHERE "2006 fed cup europe/africa group ii" = "edition" AND "against" = "greece"