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 ...

Adds columns to, drops columns from, and changes column attributes in an existing table. Adds, modifies, and drops integrity constraints from an existing table. Restriction: You cannot use any type of ...

Want faster SQL queries? Here are nine best practices for writing SQL queries that work like a charm (or at least, like they should).