Show id and location of railways that are associated with more than one train.
CREATE TABLE railway (Location VARCHAR, Railway_ID VARCHAR); CREATE TABLE train (Railway_ID VARCHAR)
[SQL] SELECT T2.Railway_ID, T1.Location FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID GROUP BY T2.Railway_ID HAVING COUNT(*) > 1 [/SQL]