Table: train_schedule_10
Columns: train_no
train_name
origin
destination
frequency

Question: What is number of the train that originated in Secunderabad Junction?
SQL: SELECT "train_no" FROM train_schedule_10 WHERE "origin" = 'secunderabad junction'

Question: From where did the train that arrived in the Anand Vihar Terminal originate?
SQL: SELECT "origin" FROM train_schedule_10 WHERE "destination" = 'anand vihar terminal'

Question: From where did Train No. 15929/30 originate?
SQL: SELECT "origin" FROM train_schedule_10 WHERE "train_no" = '15929/30'

Question: What is the frequency of the train to Bangalore?
SQL: SELECT "frequency" FROM train_schedule_10 WHERE "destination" = 'bangalore'

Question: What is the frequency of the Chennai Egmore Dibrugarh Express to Dibrugarh?
SQL: SELECT "frequency" FROM train_schedule_10 WHERE "destination" = 'dibrugarh' AND "train_name" = 'chennai egmore dibrugarh express'