Beginner's Question On Cluster Indexes
Jan 24, 2007
Hi,
Imagine a group of tables headed by Columns: "Day","Customer",and "Town". With One C.Index already built based on "Day" and "Customer". Most queries have only these 2 Columns in their WHERE Clauses.
Now if a new group of Queries are to be run where the WHERE Clause will take "Day" and "Town" but not "Customer".
Question:
Is it better to a) add a New - 2nd C.Index to each table based on "Day" and "Town" or b) to remove it and Create a New (Only one) Cluster Index based on 3 Columns: "Day","Customer","Town" ?
Appreciate any advice,
Gezza
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Feb 5, 2014
We have two non cluster indexes on the same column for a table. let me know will it impact negatively on table like performance etc. ?
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Jul 1, 2014
I'm working to improve performance on a database I've inherited, and there are several thousand indexes. I've got a list of ones which should definitely exist within the database, and I'm looking to strip out all the others and start fresh, though this list is still quite large (1000 or so).
Is there a way I can remove all the indexes that are not in my list without too much trouble? I.e. without having to manually go through them all individually. The list is currently in a csv file.
I'm looking to either automate the removal of indexes not in the list, or possibly to generate the Create statements for the indexes on the list and simply remove all indexes and then run these statements.
As an aside, when trying to list all indexes in the database, I've found various scripts to do this, but found they all seem to produce differing results. What is the best script to list all indexes?
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Oct 10, 2015
During the installation of Adding node to a SQL Server failover cluster(On passive node) getting error like.. The MOF compiler could not connect with the WMI server. This is either because of a semantic error such as an incompatibility with the existing WMI repository or an actual error such as the failure of the WMI server to start.We run the below commands but didn’t get any resolution & got the same above error .
1<sup>st</sup> Method…
1. Open console command (Run->CMD with administrator privileges).
2. net stop winmgmt
3. Rename folder %windir%System32WbemRepository to other one, for backup purposes (for example _Repository).
4. net start winmgmt
2<sup>nd</sup> Method..
1. Disable and stop the WMI service.
a) Command : - sc config winmgmt start= disabled
b. Command : - net stop winmgmt
2. Run the following commands.
a). Command: Winmgmt /salvagerepository %windir%System32wbem
b). Command: Winmgmt /resetrepository %windir%System32wbem
3. Re-enable the WMI service
Command: sc config winmgmt start= auto
Last command to run after above steps
4. Command: mofcomp "%programfiles(x86)%Microsoft SQL Server100Sharedsqlmgmproviderxpsp2up.mof"
File not found Error for above command.
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Jun 10, 2015
I am in the process of moving databases from a SQL 2005 Standard version to a 2-node 2014 cluster.All of my 2005 databases back up successfully.They all restore without issue except for one database that has a full text catalog. I get this message
Msg 7610, Level 16, State 1, Line 2
Access is denied to "fileStoragedataMSSQLSERVERFullTextCatalog", or the path is invalid.
Msg 3156, Level 16, State 50, Line 2
File 'sysft_FTCatalog' cannot be restored to 'fileStoragedataMSSQLSERVERFullTextCatalog'. Use WITH MOVE to identify a valid location for the file.
Msg 3119, Level 16, State 1, Line 2
Problems were identified while planning for the RESTORE statement. Previous messages provide details.
Msg 3013, Level 16, State 1, Line 2
RESTORE DATABASE is terminating abnormally.
[code]....
I went as far as giving the folder full access to everyone temporarily and received the same error.
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Apr 10, 2014
I ran the Advanced cluster preparation for a new sql instance on an existing cluster.
Slq Server 2012.
After is completed, it was successful, I realized I specified the wrong Instance Root directory.
Is it possible to remove what the preparation installed? Or is it possible to change the root directory?
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Jul 6, 2015
Can I build a cluster by adding the cluster service, then the SQL instances, then add the other nodes and their passive SQL instances?I would lean to building the cluster first, the add the SQL instances.
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Feb 18, 2014
I´ve been reading that SQL Server 2012 Always On is dependent on having a Windows Failover Cluster setup. Is that correct ?
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Nov 6, 2014
I have following script which i am planning to run to drop all non-clustered primary keys on a database and then created as clustered. I am using someone else's script so don't know how to modify this. Some of primary key columns are used in references in other tables.
is there anyway i can drop the existing primary keys and using their original script then create again as clustered including restoring all foreign and reference keys and unique or no unique.
DECLARE @table NVARCHAR(512), @tablename NVARCHAR(512),
@sql NVARCHAR(MAX), @sql2 NVARCHAR(MAX), @sql3 NVARCHAR(MAX),
@column NVARCHAR(MAX);
DECLARE @indexname NVARCHAR(512);
SELECT name As 'Table'
[Code] ....
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Oct 8, 2015
can we join a node in a windows cluster which is already in a different cluster?
We have this requirement as we need to setup readable secondary ( always on AG) on the third node.
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Jul 15, 2015
We are planning to change all IPs of PRODUCTION Failover Cluster Setup. In my cluster setup ... we have 2 Physical Nodes with windows-2008, Roles are MSDTC and SQL-2008R2.
IP change for:
1. Both Nodes(Physical)
2. MSDTC
3. SQL Server
4. windows Cluster
So Almost... All IPs are going to change.
Im DBA here, I need to take care of SQL cluster and MSDTC. But I haven't performed this activity before.So I'm worrying about Impacts and consequences of this change. steps how should I perform this activity.
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May 20, 2003
Hi all,
We have many tables which have cluster index on column with datatype 'Char(200)'.
Does anyone have script to change cluster index to noncluster for all user tables which have clustered index on a column with 'char(200)' datatype.
Thanks,
Deepak
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Jul 26, 2015
Wanted to know about difference between cluster and non cluster index with example.
When to use cluster index and non cluster index .
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Jun 10, 2015
CREATE TABLE [dbo].[Access](
[AdminID] [int] NOT NULL,
[FnID] [int] NOT NULL,
CONSTRAINT [PK_AccessFn] PRIMARY KEY NONCLUSTERED
[Code] ....
why the cluster and non cluster indexed created on the same key?
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Sep 18, 2007
So I'm reading http://www.sql-server-performance.com/tips/clustered_indexes_p2.aspx and I come across this:
When selecting a column to base your clustered index on, try to avoid columns that are frequently updated. Every time that a column used for a clustered index is modified, all of the non-clustered indexes must also be updated, creating additional overhead. [6.5, 7.0, 2000, 2005] Updated 3-5-2004
Does this mean if I have say a table called Item with a clustered index on a column in it called itemaddeddate, and several non-clustered indexes associated with that table, that if a record gets modified and it's itemaddeddate value changes, that ALL my indexes on that table will get rebuilt? Or is it referring to the table structure changing?
If so does this "pseudocode" example also cause this to occur:
sqlstring="select * from item where itemid=12345"
rs.open sqlstring, etc, etc, etc
rs.Fields("ItemName")="My New Item Name"
rs.Fields("ItemPrice")=1.00
rs.Update
Note I didn't explicitly change the value of rs.fields("ItemAddedDate")...does rs.Fields("ItemAddedDate")=rs.Fields("ItemAddedDate") occur implicitly, which would force the rebuild of all the non-clustered indexes?
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Jul 17, 2000
I am trying to upgrade a SQL Server 6.5(Cluster) to SQL Serevr 7.0 (Cluster)..I already have an intsllation of 7.0(On a Cluster),so this means that 6.5 and sql 7 are on seperate cluster's ,if i try to upgrade from 6.5 Cluster to 7.0 Cluster is asks me to uncluster 6.5 and 7.0 is this correct ,assume i cannot break the cluster then what???.. what is the best way i can achieve this functinality.....
thanks in advance
Jack
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J
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Sep 12, 2007
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Thanks
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hi there. this is my first post on this forum. im new to SQLServer so please go easy on me. :)
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CREATE PROCEDURE sp_Account_I]
@Username varchar(16),
@Password varchar(88),
@Surname varchar(32),
@DateBirth datetime,
@Email varchar(64),
@Id_Account int OUTPUT,
@Id_User int OUTPUT
AS
DECLARE @ErrorCode int;
BEGIN
SET NOCOUNT ON;
EXEC sp_User_I
@Username,
@Password,
@FirstName,
@Surname,
@DateBirth,
@Email,
@Id_Country,
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END
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Mar 19, 2008
Hi all,
I've been banging my head against this issue, and I haven't managed to find a solution. I was hoping that maybe somebody here has done something similar.
I am trying to get the latest available pricing from a Rate table, which is based on the customer ID and the provided date from another table (Table1).
This is what the code looks like, essentially:
select
table1.*
,table2.*
,table3.Rate
from table1
left outer join table2 on table1.Id = table2.Id
left outer join (
Select Top 1 Rate from RateTable
Where RateTable.date < table1.date
order by RateTable.date desc
) as table3 on table3.custId = table1.custId
I understood that table1.date can't be explicitly passed into the nested join within table3, but does anybody know a work around that can achieve the above example (the environment is SQL server 2000 and inside a view not on in a stored proc)?
Thanks in advance for any tips or workaround.
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Hi,I am completely new to the BCP utility and fairly new to SQL ServerI am learning from a book and I am trying the following example (the serverI'm learning on is called contractor and a password has not been give to thesa)bcp pubs..authors out authors.txt -C -r -t, -U sa -P -S contractorWhen I run this in Query Analyser i get the error message..Server: Msg 170, Level 15, State 1, Line 1Line 1: Incorrect syntax near '.'.I have tried puuting quotes around the database and the table name asfollows-bcp "pubs..authors" out authors.txt -C -r -t, -U sa -P -S contractorand get the errorServer: Msg 179, Level 15, State 1, Line 1Cannot use the OUTPUT option when passing a constant to a stored procedure.Please can anybody help me to get this first bit working?Thanks in anticipation.
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Apr 19, 2008
Hi
is there any SQL server book or online meterial for beginners?? i've checked msdn its seems not helpful at beginner level.like issues for installing and first time configuring SQL Server. and installing its clients etc.
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Jun 25, 2015
I have a requirement to only rebuild the Clustered Indexes in the table ignoring the non clustered indexes as those are taken care of by the Clustered indexes.
In order to do that, I have taken the records based on the fragmentation %.
But unable to come up with a logic to only consider rebuilding the clustered indexes in the table.
create table #fragmentation
(
FragIndexId BigInt Identity(1,1),
--IDENTITY(int, 1, 1) AS FragIndexId,
DBNAME nvarchar(4000),
TableName nvarchar(4000),
[Code] ....
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Sep 17, 2006
What is the difference please?
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Jan 23, 2006
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Not that many fields, though - it's not that complicated a database.
Many thanks in advance for any help :beer:
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Feb 7, 2007
Hi!
I'm trying to make a dictionary.
WordEng(#id,word);
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tables with words in Italian and English.
Connect1(#id,id1,id2); connecting word form Eng with Ita translation.
Connect2(#id,id1,id2); same for Italian.
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Dec 8, 2006
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Aug 17, 2007
Hi guys,
I am new to database programming... i know the answer is somewhere in the past forums and i unfortunately i can't locate it... I have this problem i hope you can help me.
I am trying to insert values into table hosp_wareitem and one of it is the itemid where in i would like to get the item id of an existing medicine... (i hope you can understand me guys) here is my query.. right now im puzzled and i know the answer is already there.. i just cant see it...
set xact_abort on
declare @id as integer
begin transaction
select @id (select medicines_id from
hosp_medicines where medicines_id = medicines_id)
insert into Hosp_WareItem
(ItemID,
Department_ID,
SalesGL_Code,
COSGL_Code,
InventoryGL_Code,
ExpenseGL_Code,
ReadersFeeGL_Code,
CreateBy,
UpdateBy,
DeleteBy,
CreateDate,
UpdateDate,
DeleteDate)
values
(@ID,
'1',
'AAA-111',
'AAA-000',
'AAA-112',
'',
'',
'0',
'',
'',
'1/1/1900 12:00:00 AM',
'1/1/1900 12:00:00 AM',
'')
Update Hosp_Counter set Counter_ID = @ID
where Table_Description = 'wareitem'
commit transaction
it returns an error
(1 row(s) affected)
(24 row(s) affected)
Server: Msg 515, Level 16, State 2, Line 6
Cannot insert the value NULL into column 'ItemID', table 'Medix_Hospital.dbo.Hosp_wareitem'; column does not allow nulls. INSERT fails.
it tries to insert a null value in itemid because it cant get the value of the medicine_id.
any help is much appreciated!
puzzled
joel
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