Show the most common builder of railways.
CREATE TABLE railway (Builder VARCHAR)
SELECT TOP 1 Builder FROM railway GROUP BY Builder ORDER BY COUNT(*) DESC
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE railway (Builder VARCHAR) Question: Show the most common builder of railways. [/INST] SELECT TOP 1 Builder FROM railway GROUP BY Builder ORDER BY COUNT(*) DESC </s>