You can create an index on a PK field, but not a non-clustered index on a non-pk non-unique-constrained field. A NCL index is not relevant to the structure of the table, and is not a constraint on …

284 You would use the INCLUDE to add one or more columns to the leaf level of a non-clustered index, if by doing so, you can "cover" your queries. Imagine you need to query for an employee's ID, …

Jul 6, 2020 · Row2 ** ** ** ** There are lots of records in the two tables, so I plan to use non-clustered index to help the query (both tables have their first column set as primary key). When I created this …

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 column I would …

These two videos (Clustered vs. Nonclustered Index Structures in SQL Server and Database Design 39 - Indexes (Clustered, Nonclustered, Composite Index) ) are more helpful than a plain text answer in …

Feb 1, 2012 · 53 I want to generate a script of all the indexes in a database (Create Index). I don't want the index script along with create table script. how can we generate it in SQL Server (2005 or 2008). …

Aug 19, 2013 · I know primary differences between clustered and non clustered indexes and have an understanding of how they actually work. I understand how clustered and non-clustered indexes …

Dec 20, 2016 · I have a table with ~2 million records in and I need to add a new nonclustered index to a uniqueidentifier to improve query performance. Will adding a nonclustered index lock the table or …

Mar 30, 2017 · 71 I have a UNIQUE, NON CLUSTERED index on a table that is currently using 4 columns for the index. I want to create an alter script that can merely add another column to this …

Apr 2, 2014 · If the query tuning adviser is recommending a non-clustered index on the primary key, it is also recommending a clustered index on another column (or columns). A primary key is a constraint, …