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Questions tagged [non-clustered-index]

Non-Clustered Index contains pointers to the data that is stored in the data page. In Non-Clustered Index logical order doesn’t match with physical order of stored data on disk.

Non-Clustered Index contains pointers to the data that is stored in the data page. In Non-Clustered Index logical order doesn’t match with physical order of stored data on disk. Non-clustered index contains index key to the table records in the leaf level. There can be one or more Non-clustered indexes in a table.

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Non CLustered Index reference on the composite column

I have a non-clustered index on a datetime column (AdmitDate) and a varchar column (Status) in SQL Server. Now the issue is that I'm filtering the result only on the basis of the datetime column (no Index on AdmitDate column alone). In order for me…
Shubham
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Removing clustered index scan even if selected columns are part of index

Given below script is the simplified example of a situation I am facing - CREATE TABLE #tmp(pk bigint IDENTITY(1,1),id bigint, dt datetime) DECLARE @X BIGINT=1 WHILE (@X<9223372036854775807) BEGIN INSERT INTO #tmp VALUES (@X,GETDATE()) SET…
UVData
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SQl performance -Indexing

Here I am having a table called Tuser with greater than 100K records as I need to get those records directly with a conditiion here is my query SELECT TU.USERID,TU.ORGUNITID,TU.LOGINNAME,TU.LOGINPASSWORD,TU.FIRSTNAME,TU.LASTNAME, …
Surendra
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Index Size not reachable

I have created a non-clustered index on table columns and it contains 5GB of index data but I am not able to see this +5GB data size change on my disk. Any suggestions? Thanks
canpoint
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Best Practice for Clutered and Non Clustered Index in table with milions of rows

We have Table in Sql Server 2008 with columns as under CLI_ID INSURANCEPOliCY_No INS_Cmpny SUM_ASSURE ........... Here CLI_ID , INSURANCEPOliCY_No are the composite primary key.There are more then 2 crores of rows in the table.Now we are…
Vipul Kumar
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Do SQL Server included columns takes double space?

My question is for example I have following columns Cl1 int - primary key Cl2 int Cl3 nvarchar(200) Cl4 nvarchar(max) Now assume that I am creating a non-clustered index on Cl2 however when I query Cl2 I always retrieve Cl3 and Cl4 also. It is…
Furkan Gözükara
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best possible index on this situation

create table #testing(id int, name varchar(50)) go Insert Into #testing Values(231, 'fasd') Insert Into #testing Values(232, 'dsffd') Insert Into #testing Values(233, 'xas') Insert Into #testing Values(234, 'asdasd') create table #testing2(id…
Emman Bangis
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How can I view the STRUCTURE of an indexed table in SQL Server?

I have a general idea of what an indexed table looks like: first columns are indexed fields, last column is row id from the indexed table. But is there any way for me to actually view what a non-clustered indexed table looks like in SQL Server?
Sal
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table needs indexes to improve performance

I was having timeout issue when giving long period of DateTime in below query (query runs from c# application). Table had 30 million rows with a non-clustered index on ID(not a primary key). Found that there was no primary key so I recently updated…
user2841795
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Candidate for Non-Clustered index

I have a table structure like below : FeatureList ID - BIGINT - Primary Key - Clustered Index VIN - VARCHAR(50) Text - VARCHAR(50) Value - VARCHAR(50) Most of the query I execute on this are like : SELECT * FROM FeatureList WHERE VIN = 'ABCD' …
Akon
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Should I create index on a SQL table column used frequently in WHERE select clause?

So I wonder should I add non-clustered index to a non-unique values column in SQL 2008 R2 table. Simplified Example: SELECT Id, FirstName, LastName, City FROM Customers WHERE City = 'MyCity' My understanding is that the primary key [Id] should…
mitaka
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In SQL Server create index I got two terms one has 'Include' and other has 'with. What are the differences between both of them?

CREATE NONCLUSTERED INDEX IX_AgentRegistration_Indx2 ON [AgentRegistration] ([AgencyType], [IsFIT], [IsActive]) INCLUDE ([AgencyCode], [AgencyName]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, …
Sangam
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Tables with clustered indexes or heap tables?

What if I have table X (heap table) that is being frequently updated (INSERT and DELETE only), and table Y which can never exceed 2000 rows. Table X has a foreign key column that references a unique index of table Y, and the relationship type is…
Stylock
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In non-clustered index in SQL Server 2008 R2, does the index point to a single row or a group of rows?

I am trying to understand how non-clustered index looks up data in a table. I think, the index when non-clustered, simply points to a data page or a group of data rows when doing lookups on the indexed column value rather than pointing to an…
Sunil
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Can DBSCAN be applied on clustering Strings, If so how it can be done?

Possible Duplicate: How to apply DBSCAN algorithm on grouping of similar url I have been told to do a project in my final sem, as the project involves in clustering similar strings using DBSCAN. I want to know can this be done using DBSCAN, If…
Steven Dsouza
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