To update statistics on an external table, drop and re-create the statistics". SQL Server documentation tells us explicitly that update statistics is not supported on external tables! When creating ...

If you drop a composite index, the index is dropped for all the columns that are named in that index. You cannot use the DROP statement to drop a table or view in an external database that is ...

Learn how to drop an index in SQL, why you might want to do it, what are the risks and benefits, and what are some best practices and tips.

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.