CREATE TABLE table_204_218 (id DECIMAL, "name" TEXT, "faith" TEXT, "type" TEXT, "gov" TEXT, "opened" DECIMAL, "intake" DECIMAL, "dcsf number" DECIMAL, "ofsted number" DECIMAL, "web" TEXT, "coordinates" TEXT)

which was opened first ?
SELECT "name" FROM table_204_218 ORDER BY "opened" LIMIT 1
SELECT "name" FROM "table_204_218" ORDER BY "opened" NULLS FIRST LIMIT 1