Does A Foreign Key Automatically Get An Index?
May 23, 2007...or should I add one manually?
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Should I Index Foreign Keys?
Mar 14, 2004Hi all
What is the general consensus regarding indexing of foreign keys in tables?
I have a lot of queries that perform inner joins from the 'primary key' table to a 'foreign key' table. I was wondering if there are any special considerations to take into account.
For example, I think in some RDBMS, foreign keys are sort of automatically assigned indexes? Is there anything that SQL Server automagically does in the background when a foreign key constraint is created that may affect whether something should be indexed?
Thanks
Matt
Full-text Search Does Not Automatically Update Index When CHANGE_TRACKING AUTO
Apr 25, 2007On Sql Server 2005 Standard if I insert a new row into SomeTable that has a full-text index:
insert SomeTable(keywords)values('this is a test')
and then query:
SELECT * FROM Message WHERE Contains(keywords, ' "test" ');
I get the expected rows all rows that have "test" in the keyword.
On Sql Server 2005 Express new rows are not returned unless I rebuild the catalog.
Is this a known limitation of Express?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
CREATE TABLE [dbo].[SomeTable](
[key] [int] IDENTITY(1,1) NOT NULL,
[keywords] [nvarchar](255) NOT NULL
CONSTRAINT [PK_SomeTable] PRIMARY KEY CLUSTERED
CREATE FULLTEXT CATALOG ft AS DEFAULT;
CREATE FULLTEXT INDEX ON [dbo].[SomeTable] KEY INDEX [PK_SomeTable] ON [ft] WITH CHANGE_TRACKING AUTO
ALTER FULLTEXT INDEX ON [dbo].[SomeTable] ADD ([keywords])
ALTER FULLTEXT INDEX ON [dbo].[SomeTable] ENABLE
Foreign Key Points To Not Most Appropriate Index Of Referenced Table
Sep 23, 2015The parent table has the column OrderID which is the primary key. There is a unique non-clustered index in the same table with the same column and some included ones. A child table references the parent table on the OrderID column. Unfortunatelly, in the sys.foreign_keys table the index that has been used to acomplish the referential integrity is the unique non-clustered one instead of the primary key (which is the clustered index as well).
This is causing issues in some maintenance tasks where we need to disable all the indexes of the table apart from the clustered index. Disabling these indexes leeds to disabling the not properly configured foreign key as well. Maybe dropping the index create the constraint again and then recreate the index is a workarround but I wish to have something more elegant and future proof.
How To Automatically Create New Records In A Foreign Table When Inserting Records In A Primary Table.
Sep 13, 2006Ok, I'm really new at this, but I am looking for a way to automatically insert new records into tables. I have one primary table with a primary key id that is automatically generated on insert and 3 other tables that have foreign keys pointing to the primary key. Is there a way to automatically create new records in the foreign tables that will have the new id? Would this be a job for a trigger, stored procedure? I admit I haven't studied up on those yet--I am learning things as I need them. Thanks.
View 4 Replies View RelatedDifference Between Index Seek && Index Scan && Index Lookup Operations?
Oct 20, 2006please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
thank you in advance
SQL 2012 :: Full Text Index How To Make It NOT To Index Embedded Or Attached Documents
Sep 30, 2015I am using Full Text Index to index emails stored in BLOB column in a table. Index process parses stored emails, and, if there is one or more files attached to the email these documents get indexed too. In result when I'm querying the full text index for a word or phrase I am getting reference to the email containing the word of phrase if interest if the word was used in the email body OR if it was used in any document attached to the email.
How to distinguish in a Full Text query that the result came from an embedded document rather than from "main" document? Or if that's not possible how to disable indexing of embedded documents?
My goal is either to give a user an option if he or she wants to search emails (email bodies only) OR emails AND documents attached to them, or at least clearly indicate in the returned result the real source where the word or phrase has been found.
Clustered Index On Client_ID+ORderNO+OrdersubNo, If I Create 3 Noncluster Index On Said Column Will It Imporve Performance
Dec 5, 2007
Dear All.
We had Teradata 4700 SMP. We have moved data from TD to MS_SQL SERVER 2003. records are 19.65 Millions.
table is >> Order_Dtl
Columns are:-
Client_ID varchar 10
Order_ID varchar 50
Order_Sub_ID decimal
.....
...
..
.
Pk is (ClientID+OrderId+OrderSubID)
Web Base application or PDA devices use to initiate the order from all over the country. The issue is this table is not Partioned but good HP with 30 GB RAM is installed. this is main table that receive 18,0000 hits or more. All brokers and users are using this table to see the status of their order.
The always search by OrderID, or ClientID or order_SubNo, or enter any two like (Client_ID+Order_Sub_ID) or any combination.
Query takes to much time when ever server receive more querys. some orther indexes are also created on the same table like (OrderDate, OrdCreate Date and Status)
My Question are:-
Q1. IF Person "A" query to DB on Client_ID, then what Index will use ? (If any one do Query on any two combination like Client_ID+Order_ID, So what index will be uesd.? How does MS-SQL SERVER deal with these kind of issues.?
Q2. If i create 3 more indexes on ClientID, ORderID and OrdersubID. will this improve the performance of query.if person "A" search record on orderNo so what index will be used. (Mind it their would be 3 seprate indexes for Each PK columns) and composite-Clustered index is also available.?
Q3. I want to check what indexes has been used? on what search?
Q4. How can i check what table was populated when, or last date of update (DML)?
My Limitation is i Dont Create a Partioned table. I dont have permission to do it.
In Teradata we had more than 4 tb record of CRM data with no issue. i am not new baby in db line but not expert in sql server 2003.
I am thank u to all who read or reply.
Arshad
Manager Database
Esoulconsultancy.com
(Teradata Master)
10g OCP
Integration Services :: Rebuild Index / Refresh Index And Stats Improves Ssis Package Performance
Oct 28, 2015My SSIS package is running very slow taking so much time to execute, One task is taking 2hr for inserting 100k records, i have disabled unused index still it is taking time.I am rebuilding/Refreshing indexes and stats once in month if i try to execute on daily basis will it improve my SSIS Package performance?
View 2 Replies View RelatedIndex Was Out Of Range. Must Be Non-negative And Less Than The Size Of The Collection. Parameter Name: Index
Jan 22, 2006Keep getting this error when positioning to the last page of a report.
Using Server 2003...SqlRpt Svcs 2000 sp2
Detail error msg:
Exception of type Microsoft.ReportingServices.ReportRendering.ReportRenderingException was thrown. (rrRenderingError) Get Online Help
Exception of type Microsoft.ReportingServices.ReportRendering.ReportRenderingException was thrown.
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Anyone have any suggestions? Any way to find out what collection is blowing?...or where parameter name: index comes from?
Index Table1 And Select For 647.600 Records.. It Is So Slow.. But I Have No Index :)???
Jun 20, 2008hello friends
i have table1 and 200 coulumn of table1 :) i have 647.600 records. i entered my records to table1 with for step to code lines in one day :)
i select category1 category2 and category3 with select code but i have just one index.. it is productnumber and it is primarykey..So my select code lines is so slow.. it is 7-9 second.. how can i select in 0.1 second ? Should i create index for category1 and category2 and category3 ? But i dont know create index.. My select code lines is below.. Could you learn me and show me index for it ?? or Could you learn me and show me fast Select code lines and index or etc ??? Also my search code line have a dangerous releated to attaching table1 with hackers :)
cheersi send 3 value of treview1 node and childnode and child.childnode to below page.aspx :)
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Me.IsPostBack Then
If Request("TextBox1") IsNot Nothing ThenTextBox1.Text = Request("TextBox1")
End If
If Request("TextBox2") IsNot Nothing ThenTextBox2.Text = Request("TextBox2")
End If
If Request("TextBox3") IsNot Nothing ThenTextBox3.Text = Request("TextBox3")
End If
End If
Dim searchword As String
If Request("TextBox3") = "" And Request("TextBox2") = "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "'"
End If
If Request("TextBox3") = "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "'"
End If
If Request("TextBox3") <> "" And Request("TextBox2") <> "" And Request("TextBox1") <> "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "' and kategori2= '" & Request("TextBox3") & "'"
End If
SqlDataSource1.SelectCommand = searchword
End Sub
The Index Entry For Row ID Was Not Found In Index ID 3, Of Table 357576312
Jul 9, 2004Hi,
I'm running a merge replication on a sql2k machine to 6 sql2k subscribers.
Since a few day's only one of the merge agents fail's with the following error:
The merge process could not retrieve generation information at the 'Subscriber'.
The index entry for row ID was not found in index ID 3, of table 357576312, in database 'PBB006'.
All DBCC CHECKDB command's return 0 errors :confused:
I'm not sure if the table that's referred to in the message is on the distribution side or the subscribers side? A select * from sysobjects where id=357576312 gives different results on both sides . .
Any ideas as to what is causing this error?
Advantages Of Using Nonclustered Index After Using Clustered Index On One Table
Jul 3, 2006Hi everyone,
When we create a clustered index firstly, and then is it advantageous to create another index which is nonclustered ??
In my opinion, yes it is. Because, since we use clustered index first, our rows are sorted and so while using nonclustered index on this data file, finding adress of the record on this sorted data is really easier than finding adress of the record on unsorted data, is not it ??
Thanks
SQL 2012 :: Clustered Index Key Order In NC Index
Mar 5, 2015I have a clustered index that consists of 3 int columns in this order: DateKey, LocationKey, ItemKey (there are many other columns in this data warehouse table such as quantities, prices, etc.).
Now I want to add a non-clustered index on just one of the other columns, say LocationKey, like this:
CREATE INDEX IX_test on TableName (LocationKey)
I understand that the clustered index keys will also be added as key columns to any NC indexes. So, in this case the NC index will also get the other two columns from the clustered index added as key columns. But, in what order will they be added?
Will the resulting index keys on this new NC index effectively be:
LocationKey, DateKey, ItemKey
OR
LocationKey, ItemKey, DateKey
Do the clustering keys get added to a NC index in the same order as they are defined in the clustered index?
Clustered Index Vs. Full Text Index
Jun 18, 2008Quick question about the primary purpose of Full Text Index vs. Clustered Index.
The Full Text Index has the purpose of being accessible outside of the database so users can query the tables and columns it needs while being linked to other databases and tables within the SQL Server instance.
Is the Full Text Index similar to the global variable in programming where the scope lies outside of the tables and database itself?
I understand the clustered index is created for each table and most likely accessed within the user schema who have access to the database.
Is this correct?
I am kind of confused on why you would use full text index as opposed to clustered index.
Thank you
Goldmember
Index/performance Index For SELECT.... IN Statement
Sep 10, 2007
Hi All,
I 'm working to improve some sql performance.
One of the major syntax inside the SELECT statment is ..
WHERE FIELDA IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='A') AND
WHERE FIELDB IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='B') AND
WHERE FIELDC IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='C') AND
WHERE FIELDD IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='D') AND
WHERE FIELDE IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='E') AND
WHERE FIELDF IN (SELECT PARAVALUE FROM PARATABLE WHERE SESSIONID = "XXXXX" AND PARATYPE='F')
(It's to compare the field content with some user input parameter inside a parameter table... )
I think properly is that the SELECT ... IN is causing much slowness in the sql statement. I have indexed FIELDA , FIELDB, FILEDC etc and those PARAVALUE and PARATYPE in the PARATABLE table. But perfromance is still slow and execution takes >20 seconds for 200000 rows of records.
Do any one know if still any chance to improvide the performance like this?
Much Thanks,
Andy
Index Internals - Last Time Index Was Rebuilt?
Apr 17, 2007I'm trying to find whether there is a dmv or system view that can help me see the last time an index was rebuilt or created. Assuming I rebuilt an index using tsql commands (not a job with a history), is there a way to find out the last time that index was rebuilt?
Thanks much.
Index Scan Vs Index Seek
Mar 1, 2004I have a really strange problem.
I execute this query:
declare @cid int
set @cid = 2003227
select * from sales s, product p where p.product_Id = s.product_Id and customer_id = @cid
select * from sales s, product p where p.product_Id = s.product_Id and customer_id = @cid or @cid = 0
3 Million rows in sales, 120000 in product.
The first does and index seek, the second an index scan.
The execution plan reports that the scan takes 99.87% of the cost, and the seek takes 0.13%
This problem obviously gets worse the bigger the dataset / query /etc.
The reason I query this, is because it never used to take this long to do index scans. Is there something i can change, something i can fix?
Any help would be appreciated.
Josh
Reorganize Index And Rebuild Index ??
Mar 18, 2008Hi,
I just want to know whether any advantage or disadvantage
in doing Reorganize Index And Rebuild Index ....
Plz do comment on this ASAP !!!!
Thanks in advance
Regards
Arv
Reorganize Index And Rebuild Index
Mar 18, 2008Hi,
I just want to know whether any advantage or disadvantage
in doing Reorganize Index And Rebuild Index ....
Plz do comment on this ASAP !!!!
Thanks in advance
Regards
Arv
Clustered Index Or NonClustered Index
Apr 1, 2006Hello I want to learn disparity clustered index or nonclustered index and in queries which one run better.
example
select * from orders where orderID=5
to this query clustered or nonclustered
thanks
Simple Query Chooses Clustered Index Scan Instead Of Clustered Index Seek
Nov 14, 2006the query:
SELECT a.AssetGuid, a.Name, a.LocationGuid
FROM Asset a WHERE a.AssociationGuid IN (
SELECT ada.DataAssociationGuid FROM AssociationDataAssociation ada
WHERE ada.AssociationGuid = '568B40AD-5133-4237-9F3C-F8EA9D472662')
takes 30-60 seconds to run on my machine, due to a clustered index scan on our an index on asset [about half a million rows]. For this particular association less than 50 rows are returned.
expanding the inner select into a list of guids the query runs instantly:
SELECT a.AssetGuid, a.Name, a.LocationGuid
FROM Asset a WHERE a.AssociationGuid IN (
'0F9C1654-9FAC-45FC-9997-5EBDAD21A4B4',
'52C616C0-C4C5-45F4-B691-7FA83462CA34',
'C95A6669-D6D1-460A-BC2F-C0F6756A234D')
It runs instantly because of doing a clustered index seek [on the same index as the previous query] instead of a scan. The index in question IX_Asset_AssociationGuid is a nonclustered index on Asset.AssociationGuid.
The tables involved:
Asset, represents an asset. Primary key is AssetGuid, there is an index/FK on Asset.AssociationGuid. The asset table has 28 columns or so...
Association, kind of like a place, associations exist in a tree where one association can contain any number of child associations. Each association has a ParentAssociationGuid pointing to its parent. Only leaf associations contain assets.
AssociationDataAssociation, a table consisting of two columns, AssociationGuid, DataAssociationGuid. This is a table used to quickly find leaf associations [DataAssociationGuid] beneath a particular association [AssociationGuid]. In the above case the inner select () returns 3 rows.
I'd include .sqlplan files or screenshots, but I don't see a way to attach them.
I understand I can specify to use the index manually [and this also runs instantly], but for such a simple query it is peculiar it is necesscary. This is the query with the index specified manually:
SELECT a.AssetGuid, a.Name, a.LocationGuid
FROM Asset a WITH (INDEX (IX_Asset_AssociationGuid)) WHERE
a.AssociationGuid IN (
SELECT ada.DataAssociationGuid FROM AssociationDataAssociation ada
WHERE ada.AssociationGuid = '568B40AD-5133-4237-9F3C-F8EA9D472662')
To repeat/clarify my question, why might this not be doing a clustered index seek with the first query?
How To Add Automatically Value
Mar 15, 2007In my table have two field
Ex
TableName===> Details
-----------
No ===========>int primary key
Name =========>Char(50)
---------
i need automatically add value in first field(No)..
Once execute insert command using only second field
after automatically generated first field value
Result
--------
No Name
1 dfgd
2 dgdg
.......
--------
SIGN OUT AUTOMATICALLY
Mar 28, 2006Hi Guys,
I have a website with multiple pages and when a user signs in it puts a 1 in the database and their online status is shown to the rest of the members, if they use my signout button which I have on each page, it signs them out and updates the database with a 0 in the process, so shows them as then offline, my problem is some people forget to sign out and just close the browser window or begin surfing elsewhere.
Is there a way to have sql server 2000 automatically change the field in the database after 30 minutes of inactivity.
Or is there a way to automatically sign users out as they either click on the X in the browser window, or as they leave my site.
Any help would be appreciated.
Cheers
How To Know Automatically If The Job Hangs?
Sep 28, 2001Some of my jobs hang at FTP step for several hours until some one kills the FTP (it's a perl process) on the box. Is there a way to find how much time a particular step of the job is executing? and know it by somehow if it's hanging at that step?? If we know this,I want to kill the perl process(FTP) on the box in an automated way whenever the job hangs! Any ideas welcome!! Thanks. :-)
Di
Run SSIS In Automatically
May 7, 2007hi
This is Elangovan. How to automatically run the SSIS (SQl SERVER2005 )
plz help me
bye
elangovan
Rendering To PDF Automatically
Mar 17, 2008
Hi All,
Is there a way to modify the configuration file to allow the Report manager to rendering the report to PDF file automatically?
Thanks
Micror
Delete Tables Automatically
Nov 12, 2006How can I delete tables in a SQLServer Database automatically (at the moment I just do it using Micorosft SQl Management Studio Express manually) But its important that I can do that automatically, the best thing would be if I can do that from a .NET programm. thanks in advance,mulata
View 6 Replies View RelatedSet Update Field Automatically
Feb 11, 2007in sql server I want to update the "UpdatedDate" field automatically when I change ANY other field in that specific record.it has to be set to the current server time.
View 2 Replies View RelatedINSERTING Or UPDATING Automatically
Mar 8, 2007i am using visual web developer 2005 and SQL Express 2005 with VB as the code behindi have a button and in the button click event i have written codes to INSERT to a database table - it has one primary keyso when i click the button, if there is already a row with primary key fields value as 10 and if i try to INSERT with the same value in the primary key field there will occur primary key constraintso , if i try to INSERT with the already existing primary key fields value, instead of INSERTing it should be UPDATEd without generating any errorplease help me
View 1 Replies View RelatedHow Can I Generate Variables Automatically?
Dec 20, 2007Hi there
I need to generate some variables , like var1, var2, var3 ....
It's determined by how many records in my database.
I want to write a for() to do this. But how?
For example
for(int i=0; i<datatable.rows.count; i++){ String vari = new String;}
This is not a right way in C#, does anyone know how to?
Thanks!!!
Automatically Generate SQL Script
Feb 21, 2008I generate SQL scripts on a regular basis for my database and it's objects.
Is it possible to run a job in SQL or make windows do this automatically on a periodic basis?
Anyone done this before?
Delete Files Automatically? Help!!
Jul 31, 2002I need to setup an automated process to delete all the files older than a month in a particular directory on a network drive, how is that possible? Any help is greatly appreciated.
thanks.
Sheila.