CREATE TABLE table_18264 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Name number first elected for tennessee 2?
SELECT COUNT("First elected") FROM table_18264 WHERE "District" = 'Tennessee 2'
SELECT COUNT("First elected") FROM "table_18264" WHERE "District" = 'Tennessee 2'