Jun 2, 2010 · In SQL Server, a clustered index determines the physical order of data in a table. There can be only one clustered index per table (the clustered index IS the table).

Jul 6, 2011 · For traditional SQL Server, the filters you define in your 'Where' clause should persuade the engine to use any relevant indices... Provided the engine's execution plan can …

Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level? For information on queries to index a field, check …

In SQL Server 2005, you can also add additional columns to the index that are not part of the key which can eliminate trips to the rest of the row. Having multiple indexes, each on a single …

Jun 16, 2015 · Speeding up a SQL query with indexes Asked 10 years, 4 months ago Modified 10 years, 4 months ago Viewed 39k times

Nov 25, 2009 · I need a query to see if a table already has any indexes on it.

As a follow up to "What are indexes and how can I use them to optimise queries in my database?" where I am attempting to learn about indexes, what columns are good index candidates? …

Sep 10, 2015 · I have a very large SQL Server 2008 R2 database (1.5TB) and will be copying some data from column to column within the same table. I've been told that the schema has a …

Mar 15, 2013 · The importances to this when indexing on the datetime say for instance '2015-06-05 22:47:20.102' the index has to account for every place within the datetime. This becomes …

May 20, 2010 · Also, in the case of SQL Server, if you go with the default options then a Primary Key is created as a clustered index while the unique index (constraint) is created as a non …