List the writers who have written more than one book.
CREATE TABLE book (Writer VARCHAR)
SELECT Writer FROM book GROUP BY Writer HAVING COUNT(*) > 1
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE book (Writer VARCHAR) Question: List the writers who have written more than one book. [/INST] SELECT Writer FROM book GROUP BY Writer HAVING COUNT(*) > 1 </s>