CREATE TABLE "important_originating_express_trains" (
  "train_no" text,
  "train_name" text,
  "destination" text,
  "category" text,
  "frequency" text
);

Question: What is the category for trains numbered 16609/16610?
SQL: SELECT "category" FROM "important_originating_express_trains" WHERE "train_no"='16609/16610';

Question: What trains have a category of express and a weekly frequency?
SQL: SELECT "train_name" FROM "important_originating_express_trains" WHERE "category"='Express' AND "frequency"='Weekly';

Question: What is the train name that has a destination of Tuticorin?
SQL: SELECT "train_name" FROM "important_originating_express_trains" WHERE "destination"='Tuticorin';

Question: What is the frequency of trains numbered 12671/12672?
SQL: SELECT "frequency" FROM "important_originating_express_trains" WHERE "train_no"='12671/12672';

Question: How many destinations have a weekly frequency and are named AC Express?
SQL: SELECT COUNT("destination") FROM "important_originating_express_trains" WHERE "frequency"='Weekly' AND "train_name"='AC Express';

Question: What is the number of frequencies that have a destination of Jaipur?
SQL: SELECT COUNT("frequency") FROM "important_originating_express_trains" WHERE "destination"='Jaipur';