CREATE TABLE table_name_17 (club VARCHAR2, group VARCHAR2, stadium VARCHAR2)

When in 2009 season has a Group of group b, and cancha del mystic with a Club of el tecal?
SELECT 2009 AS _season FROM table_name_17 WHERE group = "group b" AND stadium = "cancha del mystic" AND club = "el tecal"
SELECT 2009 AS "_season" FROM "table_name_17" WHERE "cancha del mystic" = "stadium" AND "club" = "el tecal" AND "group b" = "group"