indexing - What is an index in SQL? - Stack Overflow
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).
sql - How to use index in select statement? - Stack Overflow
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 efficiently identify …
sql - How does database indexing work? - Stack Overflow
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 out ...
What is the ideal indexing strategy for SQL Server? [closed]
What is the ideal indexing strategy for SQL Server? [closed] Asked 14 years, 9 months ago Modified 7 years, 5 months ago Viewed 17k times
sql server - Multiple Indexes vs Multi-Column Indexes - Stack Overflow
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 column may …
indexing - SQL Server: how to write an alter index statement to add a ...
Mar 30, 2017 · The ALTER INDEX statement in SQL Server (see docs) is available to alter certain properties (storage properties etc.) of an existing index, but it doesn't allow changes to the columns …
sql server - What columns generally make good indexes? - Stack …
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? Specifically …
indexing - SQL Server - When to use Clustered vs non-Clustered Index ...
Aug 19, 2013 · But only if you pick a good clustered index. It's the most replicated data structure in your SQL Server database. The clustering key will be part of each and every non-clustered index on your …
sql - When should I use primary key or index? - Stack Overflow
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-clustered index. …
What is the difference between OFFLINE and ONLINE index rebuild in …
Dec 30, 2024 · The main differences are: 1) OFFLINE index rebuild is faster than ONLINE rebuild. 2) Extra disk space required during SQL Server online index rebuilds. 3) SQL Server locks acquired …