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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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Multiple Index Personalities: Borderline duplicate keys

I am running sp_BlitzIndex from Brent Ozar and get a number of these items. Multiple Index Personalities: Borderline duplicate keys I'm not 100% on what to do but here is an example below. CREATE INDEX [IX_Test] ON [Test] ( [SportId] ) WITH…
Mike Flynn
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Nonclustered indexes will partially cover the select query

I having a non-clustered indexes created in my SQL database server with Include keyword. Please find my non-clustered index created for FACTORS table. CREATE NONCLUSTERED INDEX [FACTORS_BKEY_PNO_IDX] ON [dbo].[FACTORS] ( [BATCH_KEY]…
Karthikeyan
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Select has less column then Include columns in index

Let say I have non clustered index is created with include columns If we query select col2, col3 from table1 where col1=value1 Index is created on col1 with include col2,col3,col4. In this case, Will my non clustered index will be used, and it will…
Virul Patel
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Set non clustered index on (which columns) if using pivot query

I'm fetching data from two tables by joining (on [icn] & [report_date] ). The intent is to have the data as pivot on [responsible team] column from UHCG_INVENTORY_RAW table. So as you can see I'm getting the unique teams first and then applying it…
iklakh.shekh
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NONCLUSTERED index command (MySQL) is not available in MySQL or Workbench

When I create an index in a simple way, everything works well: create index qty_ix on vacancy_desc_to_words (qty); But when I try to create NONCLUSTERED INDEX, I have problems: neither a Workbench not MySQL console does know the NONCLUSTERED and…
Valentyn Hruzytskyi
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No results visible with the %%lockres%% function

We are encountering deadlocks in our system and the deadlock graph shows this format of wait resources. waitresource="KEY: 500:xxxxxxxxxx (f4d477997e11) waitresource="KEY: 500:xxxxxxxxxx (8d4830b45673)" Now both the victim and the winner have…
user_me
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Linq Query For AutoComplete Match With Multiple Columns C#

I am implementing search feature on my blog site ,each blog may contains title,slug,post content etc ,which should work like this , Goal When user type a keyword it should search for that string contains in any of 3 column in Sql Server in…
TAHA SULTAN TEMURI
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How to optimize T-SQL query which depends on execution time?

I have a big (several millions rows) table with system events. I must to get recent event counts and I'm not shore how to do it in right way. I created this view: CREATE VIEW [dbo].[EventCounts] AS SELECT (SELECT COUNT(1) FROM…
Oblomingo
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SQL Server: Key Lookup without Clustered Index

I have a table named Scan that has just two columns: id (int) and a (char). It starts without any index. So I created a nonclustered index link following CREATE INDEX ix_id ON scan(id ASC) So I ran this select: SELECT id, a FROM Scan WHERE id =…
Mucida
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Why index setting is able to affect query cost when scan is imperative

I'm having a review of performance tuning study and practicing with AdventureWorks2012. I built 4 copies from Product table then setup with the following indexes. --tmpProduct1 nothing CREATE CLUSTERED INDEX cIdx ON tmpProduct2 (ProductID…
Circle Hsiao
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How handle table updates/inserts if there is an index on table

Hi i am a bit confused about the handling of indexes in postgres. I use the 9.6 version. From my understanding after reading postgres docs and answers from stackoverflow i want to verify the following: postgres does not support indexes with the…
Tapxxor Stanijkis
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Handling very big table in SQL Server Performance

I'm having some troubles to deal with a very big table in my database. Before to talk about the problem, let's talk about what i want to achieve. I have two source tables : Source 1: SALES_MAN (ID_SMAN, SM_LATITUDE, SM_LONGITUDE) Source 2:…
Hadria Mehdi
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Non Clustered Index on UniqueIdentifier columns

WE have a simple SQL query selecting two columns like below SELECT TEAMID,iSvALID FROM teams where teamid='{{guid}}' and subid = {{guid}}. we had issues with performance of this query as there was no index which I also have added now... like…
CSharped
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Where does nonclustered index physically exists

I know that cluster index exist on the table itself, but where's the noncluster index and is pointer exist? I thought on "temp DB", but maybe i am wrong. I did not find anything about it on the web. Can you help me with it?
ohad mesika
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Is the creating nonclustered PK syntax inconsistent?

SQL Server 2008 R2 Why create table A ( id int, primary key nonclustered (id) ) is correct and executed without errors? But create table A ( id int, primary key nonclustered id ) is an error? giving Incorrect syntax near ')'. …
Gennady Vanin Геннадий Ванин
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