SQL has faded in popularity as noted in the TIOBE Index as people working in AI switch to NoSQL databases.

In a SQL Server, two types of indexes exist; Clustered and non-clustered indexes. Both clustered indexes and non-clustered indexes have the same physical structure. Moreover, both of them are stored ...

If the clustered index is non-unique, account for the uniqueifier column: The uniqueifier is a nullable, variable-length column. It will be non-null and 4 bytes in size in rows that have non-unique ...

How to Reindex SQL Tables. The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can ...

For unique indexes we use an additional key suffix column to distinguish rows that contain null values in DocDB. For non-unique indexes we already add the primary key columns to the index (DocDB) k ...

Non-clustered Columnstore Indexes are also getting some enhancements in SQL Server 2016. The most notable of these enhancements is the ability to be updated.

The most important performance-tuning technique available is having the needed indexes created on the tables to ensure that the SQL Server database engine is able to get the data that it needs to ...