CREATE TABLE table_20774 ("Institution" CLOB, "Location" CLOB, "Founded" FLOAT, "Affiliation" CLOB, "Enrollment" FLOAT, "Team Nickname" CLOB, "Primary conference" CLOB, "Home Rink" CLOB)

Private/Catholic school's minimum enrollment is?
SELECT MIN("Enrollment") FROM table_20774 WHERE "Affiliation" = 'Private/Catholic'
SELECT MIN("Enrollment") FROM "table_20774" WHERE "Affiliation" = 'Private/Catholic'