The nonclustered-index tag should be used for questions regarding how to implement and troubleshoot supplemental indexes used primarily to enhance performance. The term nonclustered is typically a SQL Server-specific term.

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Index Evaluation

I have been doing some index evalaution on a table and this is the first time I have ever looked at how well indexes are performing so and would like some advice on a certain index. The non ...
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3answers
567 views

When to create Indexes?

I have a stored procedure that takes around 2 minutes to execute. The execution plan suggested me to create a non clustered index on a table (which is a high traffic table with millions of records in ...
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1answer
369 views

Unique Non Clustered Column in Partitioned table

We have partitioned one of our SQL Server tables on a Clustered Index datetime column, we have a Primary key Non-clustered index column with Identity data type and this column is setup as a non-...
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1answer
416 views

Covering Index - Include columns

I have a table : [sch].[Parent] ( ID Identity [INT] (PK), Name VARCHAR(100), Email VARCHAR(250), Active TINYINT, InsertedBy VARCHAR(100), InsertedDTM DATETIME, ...
2
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1answer
652 views

Non-clustered Index Update not displayed in execution plan [duplicate]

Possible Duplicate: Nonclustered Index Insert I'm trying to work out the cost of having a nonclustered index on a particular table, but I don't see any maintenance cost in the execution plan ...
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1answer
7k views

fundamental difference between Primary/Clustered and Secondary/Non-Clustered index

Are Primary Index and Clustered Index similar in concept Secondary Index and Non-Clustered Index similar in concept
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2answers
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Large Fact table and partitioning key dilemma

I have fairly large fact table (2 billion records, approx 120 GB). This table is not partitioned and the queries are very slow to respond. I am planning to partition the table and indexes. The table ...
3
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1answer
207 views

Aren't two writes required to update a clustered index record

I was reading the article on indexes at simple-talk, where it is written that If a heap has a non-clustered index on it (as the primary key), and data is inserted into the table, two writes have ...
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2answers
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Should I create a nonclustered index on all searchable columns or just each column separately?

I am not sure as to properly use non-clustered indexes. The SSMS plan estimator said to add another index when the following index was on the table already. CREATE NONCLUSTERED INDEX [...
6
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1answer
1k views

How are indexes represented in an ERD?

What do indexes look like in an Entity Relationship Diagram? I've googled it and I'm unsure what the standard look of an index is in an ERD. And I'm talking about the crowsfoot diagram that includes ...
5
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2answers
354 views

Need for reaching data through clustered index with a non-clustered index

I have found that when a table has both clustered and non-clustered indexes (on different columns), the leaf level non-clustered pages, instead of pointing to the data row, point to the node of the ...