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 …

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? …

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

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

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 …

I've created composite indexes (indices for you mathematical folk) on tables before with an assumption of how they worked. I was just curious if my assumption is correct or not. I assume …

May 20, 2009 · Otherwise for the non unique case SQL Server adds the row locator (clustered index key or RID for a heap) to all index keys (not just duplicates) this again ensures they are …