CREATE TABLE table_23221 ("Institution" TEXT, "Location" TEXT, "Nickname" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Joined" FLOAT, "Left" TEXT, "Current Conference" TEXT)

What's the nickname of the students of the school that joined the Conference in 2010?
SELECT "Nickname" FROM table_23221 WHERE "Joined" = '2010'
SELECT "Nickname" FROM "table_23221" WHERE "Joined" = '2010'