CREATE TABLE table_55915 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Leading scorer" TEXT, "Record" TEXT)

Which date's visitor was jazz, when the leading scorer was Mehmet Okur (22)?
SELECT "Date" FROM table_55915 WHERE "Visitor" = 'jazz' AND "Leading scorer" = 'mehmet okur (22)'
SELECT "Date" FROM "table_55915" WHERE "Leading scorer" = 'mehmet okur (22)' AND "Visitor" = 'jazz'