ernad express มีกี่เส้นทาง/ผ่าน?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many route/via's are there for the ernad express?It is not neccessary to use all the tables.
 table_29770377_1:  (route_via [ VARCHAR ] train_name [ VARCHAR) ]
SELECT COUNT(route_via) FROM table_29770377_1 WHERE train_name = "Ernad Express"