CREATE TABLE table_123 ("Club" TEXT, "Position in 2012" TEXT, "First season" TEXT, "Number of seasons" FLOAT, "First season of current spell" FLOAT, "Titles" FLOAT, "Last title" TEXT)

What was the first season for the club that in 2012 was 2nd in Superettan?
SELECT "First season" FROM table_123 WHERE "Position in 2012" = '2nd in Superettan'
SELECT "First season" FROM "table_123" WHERE "Position in 2012" = '2nd in Superettan'