In SQL Server, updates and inserts are processed initially into a B-tree table called a delta store. Eventually, a process called a tuple mover compresses the data into the columnstore structure.

SQL Server 2012 includes a lot of new and exciting features. One feature that has caught the imagination of many in the user community is the high-performance feature called Columnstore Indexes.

If you've spent any amount of time working with MySQL, you've likely heard about B+ trees. This data structure is the underlying foundation for most indexes in the database management system. Despite ...

This article explores the internals of Oracle9i indexing; reviews the standard b-tree index, index-only tables, and how these indexes may increase the speed of Oracle SQL queries.

Most commercial database systems support B/sup +/-tree indexes using either: physical row identifiers, for example, DB2; or logical row identifiers, for example, NonStop SQL. Physical row identifiers ...