CREATE TABLE table_41908 ("Single" CLOB, "CCM Chart" CLOB, "Debut" CLOB, "Peak Date" CLOB, "Peak Pos" FLOAT, "Total Wks" FLOAT, "Spins  ( since 1998 )  source: Mediabase" FLOAT)

What CCM Chart had 18 total weeks?
SELECT "CCM Chart" FROM table_41908 WHERE "Total Wks" = '18'
SELECT "CCM Chart" FROM "table_41908" WHERE "Total Wks" = '18'