CREATE TABLE table_30437 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Affiliation" TEXT, "Enrollment" FLOAT, "Team Nickname" TEXT, "Primary conference" TEXT)

What's the nickname of the team with enrollment of 40747?
SELECT "Team Nickname" FROM table_30437 WHERE "Enrollment" = '40747'
SELECT "Team Nickname" FROM "table_30437" WHERE "Enrollment" = '40747'