BP001
Published 16 November 2017
Index type is not specified
The index type (whether it is CLUSTERED or NONCLUSTERED) is not specified explicitly in the CREATE INDEX statement.
You can only have one clustered index on a table, of course, and this choice has a lot of influence on the performance of queries, so you should take care to select wisely. The primary key is often, but not only, the correct choice.