indexing - What is an index in SQL? - Stack Overflow
Jun 2, 2010 · These two videos (Clustered vs. Nonclustered Index Structures in SQL Server and Database Design 39 - Indexes (Clustered, Nonclustered, Composite Index) ) are very helpful …
How to see indexes for a database or table in MySQL?
Mar 6, 2011 · SHOW INDEXES FROM database_name.table_name; Note that INDEX and KEYS are the synonyms of the INDEXES, IN is the synonym of the FROM, therefore, you can use …
sql server - Multiple Indexes vs Multi-Column Indexes - Stack …
Indexes in SQL Server 2005/2008 – Best Practices, Part 1 Indexes in SQL Server 2005/2008 – Part 2 – Internals One thing to note, clustered indexes should have a unique key (an identity …
sql - Creating an index on a table variable - Stack Overflow
May 20, 2009 · In SQL Server 2000 - 2012 indexes on table variables can only be created implicitly by creating a UNIQUE or PRIMARY KEY constraint. The difference between these …
What is the difference between OFFLINE and ONLINE index …
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 …
Why use the INCLUDE clause when creating an index?
Notice that if a column - that is added as an included -column of index - is used in the restriction: As long as the index as such can be used (based on restriction against index- key -columns) - …
sql - What are indexes and how can I use them to optimize queries …
Mar 9, 2014 · Indexes are a balancing act, every index you add usually will add time to data inserts, updates and deletes but can potentially speed up selects and joins in complex inserts, …
Table and Index size in SQL Server - Stack Overflow
Nov 25, 2008 · Can we have a SQL query which will basically help in viewing table and index sizes in SQl Server. How SQL server maintains memory usage for tables/indexes?
How do I find a disabled index on SQL server 2008 - Stack Overflow
Dec 30, 2024 · A while back when I was performing some bulk inserts of data into my SQL Server database, I disabled a number of indexes to improve the insert performance. I now need to go …
List of all index & index columns in SQL Server DB
Apr 20, 2009 · How do I get a list of all index & index columns in SQL Server 2005+? The closest I could get is: select s.name, t.name, i.name, c.name from sys.tables t inner join …