List the object number of railways that do not have any trains.
CREATE TABLE train (ObjectNumber VARCHAR, Railway_ID VARCHAR); CREATE TABLE railway (ObjectNumber VARCHAR, Railway_ID VARCHAR)
SELECT ObjectNumber FROM railway WHERE NOT Railway_ID IN (SELECT Railway_ID FROM train)
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE train (ObjectNumber VARCHAR, Railway_ID VARCHAR); CREATE TABLE railway (ObjectNumber VARCHAR, Railway_ID VARCHAR) Question: List the object number of railways that do not have any trains. [/INST] SELECT ObjectNumber FROM railway WHERE NOT Railway_ID IN (SELECT Railway_ID FROM train) </s>