CREATE TABLE table_64105 ("School" CLOB, "Location" CLOB, "Mascot" CLOB, "Size" FLOAT, "IHSAA Class" CLOB, "# / County" CLOB, "Year Joined" FLOAT, "Previous Conference" CLOB)

What's the year that Hagerstown joined?
SELECT "Year Joined" FROM table_64105 WHERE "School" = 'hagerstown'
SELECT "Year Joined" FROM "table_64105" WHERE "School" = 'hagerstown'