What is the impact on the users to drop an index on a table while in use? I will recreate the index afterwards. The table is used constantly by a three of processes/users at all times.
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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
Hi,I found this SQL in the news group to drop indexs in a table. I need ascript that will drop all indexes in all user tables of a givendatabase:DECLARE @indexName NVARCHAR(128)DECLARE @dropIndexSql NVARCHAR(4000)DECLARE tableIndexes CURSOR FORSELECT name FROM sysindexesWHERE id = OBJECT_ID(N'F_BI_Registration_Tracking_Summary')AND indid 0AND indid < 255AND INDEXPROPERTY(id, name, 'IsStatistics') = 0OPEN tableIndexesFETCH NEXT FROM tableIndexes INTO @indexNameWHILE @@fetch_status = 0BEGINSET @dropIndexSql = N' DROP INDEXF_BI_Registration_Tracking_Summary.' + @indexNameEXEC sp_executesql @dropIndexSqlFETCH NEXT FROM tableIndexes INTO @indexNameENDCLOSE tableIndexesDEALLOCATE tableIndexesTIARob
View 2 Replies View RelatedWe are unable to drop a database user with the following error "Msg 15284, Level 16, State 1, Line 1
The database principal has granted or denied permissions to objects in the database and cannot be dropped."
On checking the database permissions we have the following permissions assigned to the user
classclass_descmajor_idminor_idgrantee_principal_idgrantor_principal_idtypepermission_namestatestate_desc
17SERVICE655360517SN SENDGGRANT
17SERVICE655370517SN SENDGGRANT
17SERVICE655380517SN SENDGGRANT
17SERVICE655390517SN SENDGGRANT
17SERVICE655400517SN SENDGGRANT
[Code] ....
How we can revoke the SEND permissions?
I have a temptable with a list of user IDs that I want to drop so I created a script to do a cursor and run through my drop functions. The drops work by themselves and the ver check works with them but when I wrap them in the cursor all i get is an output for each user in the results window in ssms. why it's not setting the variable and instead outputting to results?
DECLARE @ver nvarchar(128);
DECLARE @UserName nvarchar(50);
DECLARE @UserD nvarchar(80);
DECLARE @LoginD nvarchar(80);
-- Initialize the variable.
SET @ver = CAST(serverproperty('ProductVersion') AS nvarchar)
[code]...
I would like to know the impacts (if any) of adding nonclustered index with included columns on large tables (these tables are populated by bulk insert from text files).
View 3 Replies View RelatedWhen I drop a table should I also drop it's FK ? or they keys are removed with the table?
View 2 Replies View RelatedWe have 3 maintenance jobs configured in this particular DB instance:
Daily backup of system database - SubPlan1 (Check Database Integrity Task --> Rebuild Index Task-->Backup Database Task)Daily backup of user databases - Five subplans for each task : (Check DB integrity --> Rebuild Index -->Backup User Database, Backup Log -->Cleanup History)Weekly maintenance - SubPlan1 (Check Database integrity job (system+user DB) + rebuild index job (system+user DB) )
PROBLEM: I just noticed that the User DB Rebuild Index task has been running since the 03/04 and the Weekly maintenance plan - subplan1 since the 12/04.
Which job is "safe" to stop without impacting the database?
How do I allow a user (or group of users) permission to create/drop a table?
I have found the 'GRANT CREATE TABLE TO username' command, which will (I assume) allow a user to create a table, but how to I allow a user to 'DROP' the created table as well?
'GRANT DROP TABLE TO username' doesn't work?
and I want the users to be able to DROP/DELETE this table (temporary table created just for printing purposes) as well.
thanks
The error message is "cannot drop the table because it is being used for replication"
my sql version is in sql server 2012 and Im ussing merge replication.
I want to drop only one table.
How to grant DROP table permission within a database to an SQL login. I could see in Databae properties-> permission tab, there is an option to grant CREATE TABLE, EXECUTE permission etc, but not DROP table permission. How to grant it?
View 3 Replies View RelatedI have 2 stored procedure, insert and update.
They both drop and use a static table, this will be changed for production to use a temp table. there is a slight difference in how the create the table and when it comes to executing them if the other has been run first it errors because of the column definition or names.
Now as I said I will change these to use a temp table rather than a static staging table for production but as one of the first parts of my proc uses the IF OBJECT_ID ('dbo.tab', 'U') IS NOT NULL DROP TABLE dbo.Tab;
Then I would expect the table difference to not matter as the table is being dropped...
I have a sp. I alter stored procedure by adding some logic to that. How can I test that is there any functional impact by altering that stored procedure? How to prove to the team that the modifications doesn't impact any functionality?
View 5 Replies View RelatedI am upgrading my application's SQL Server from 2008 R2 to 2012.
As discussed in the below URL I am able to see the Identity jump after I upgrade and the server is restarted.
Now since I cannot afford this and at this moment I do not have the time to create a sequence with NOCACHE and test it again I have to go ahead and add trace flag 272 in the start up parameter as this is the only solution which I can implement and even rollback without much hassles.
[URL] ....
What I got to know, this flag will disable the new feature of IDENTITY property that has been implemented as part of SQL Server 2012 and will make it work like it was doing in SQL Server 2008 R2.
But I want to know implementing this flag would impact any other feature or performance (except the performance of IDENTITY) of SQL Server.
I have been investigating the number of connections activeinactive to a certain database server and I have stumbled across an application which seems to not be clearing its database connections.For one instance of a client there was >70 sql connections which eventuated from the closing and reopening one 1 screen in the culprut app. Once the application was closed all of the connections are recycled but its evident that within the application itself it is not correctly reusing already existing open connections.
I have raised a point with the main programmer that we need to investigate more into how the application is managingot managing its ADO .NET connections to SQL.
I am starting with doing some reading here URL... and I was hoping to get some more information about the possible impact of excessive sql connections on the SQL Server itself. Our organization is quite lucky in that our SQl Servers are Overspecced given their workload, bearing that in mind I would like to dig a bit deeper to get some stats if I can to highlight the scope of the issue to the managementprogrammers.Our SQL server peaks at 6500 processes and a good 70% of those are due to this applications mis-management of its sql connections.
This is my table type definition ( below ) and as you see I declared a table whose name is in @t
/*
CREATE TYPE BP_Data_ACRC_427
as table
(
AIMS_VALUE_NUMERIC numeric(19,2),
bp_type VARCHAR(4),
Dt datetime,
ID int IDENTITY(1,1),
MBP numeric(19,2),
MPOG_PHYSIOLOGIC_CONCEPT_ID VARCHAR(10)
)
*/
Declare @t as BP_Data_ACRC_427
Question: can we add an index that combines AIMS_VALUE_NUMERIC and Dt
How to create a script to input one table name(already indexed) to get list of all index for that table?
View 5 Replies View RelatedI have a filetable and use a statement like
SELECT [name],file_stream
FROM dbo.Inkoopfacturen
WHERE FREETEXT(file_stream, 'Factuur');
It will return the text found in a .pptx but not in a pdf. There are no errors in the FT-log. It tells me that the FT-index is succesfully build.
I have downloaded the iFilter for Adobe (installed it in a folder with a short name), set the temp variable to the bin folder of the installation.
I've executed the following queries:
EXEC sp_fulltext_service 'update_languages';
EXEC sp_fulltext_service 'load_os_resources', 1;
EXEC sp_fulltext_service 'restart_all_fdhosts';
Exec sp_fulltext_service 'verify_signature', 0
When I run the following statement, it'll show pdf in the resultset.
SELECT * FROM sys.fulltext_document_types order by document_type
Still, content is not found.
Why should we consider selectivity of a table to create index?
Which is best selectivity value to create an index ?
I am trying to create a unique index on a table such that the combination of 2 columns is unique. How do I go about that?
View 5 Replies View RelatedWhat is the threshold that warrants the need for creating an index on a table. I have a system with a TABLE that has only 500 rows, very static, but accessed many many times. The cardinality from the statistics of Actual vs. Estimate rows is off by only 5 rows. I have all clustered index scans. What I need to be looking for as I tune this DB. I am going through every stored procedure to finely tune the DB I am supporting.
View 4 Replies View RelatedI have a table with clustered index on that. I have only 5 columns in that table. Execution plan is showing that Index scan occurred. What are the cause of the Index scan how can we change that to index seek?
I am giving that kind of similar query below
SELECT @ProductID= ProductID FROM Product WITH (NOLOCK) WHERE SalesID= '@salesId' and Product = 'Clothes '
I need to create a Clustered Index (CI) on a very large SQL Server 2012 database table. This table has about approximately 10 billion rows, 500 GB in size. The job ran for about 20 hours into it and then fails with error: "Out of disk space in tempdb". My tempDB size is 1.8TB, but yet it's still not enough.
Here is my script:
CREATE CLUSTERED INDEX CI_IndexName
ON TableName(Column1,Column2)
WITH (MAXDOP= 4, ONLINE=ON, SORT_IN_TEMPDB = ON, DATA_COMPRESSION=PAGE)
ON sh_WeekDT(Day_DT)
GO
Hello, everyone:
I want to add a column, INT NOT NULL DEFAULT 0, to a table. There are about 9 mil. records, 57 columns in the table. SQL 2k on Win 2003. What impact maybe bring?
1) Is there a down time on database and server?
2) Is it possible to insert records during adding new column?
3) How long will be taken roughly?
Thanks a lot.
ZYT
I was under impression that rebuilding index online largely means that the index will remain available for use during rebuild and my procs and query will be able to use it during rebuild. Also my understanding was that table will be locked very briefly while the schema change will be completing.But when I was rebuilding the clustered index online on a large table with some 3 million records, the table got locked and I was not able even to read the data from it for some 5 minutes. Then I cancelled the operation as it was production server and it was one of our main transaction table.
Is rebuilding index online supposed to work this way? The table has no other index.The parameteres I used are:
REBUILD WITH (PAD_INDEX = ON, SORT_IN_TEMPDB = ON, ONLINE = ON, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 95)
I have created NONCLUSTERED index on table but my report is taking more time that's why i created columnstore NONCLUSTERED index on the same table but i have one query, if any table have row and column level index(same columns in index) . Which index query will consider.
View 1 Replies View RelatedHi All,
I want to know what will be the impact of changing the primarykey on a table which already has a lot of data.
For example, column A is unique, primary key. I want to make column B as unique, primary key.
Can I do that? What will be the impact on database performance?
Thanks
Sri
I understand that minimal logging can occur on a non clustered indexed heap as long as [URL] ...
*not replicated
*tablock is used
*table is empty
The following test seems to contradict this
In the test I create a non indexed heap, insert some record and check the log, then repeat the test on an indexed heap.
The results suggest that even though the conditions for minimal logging into a indexed heap are met, minimal logging is not happening although it does happen on an non indexed heap. What am I doing wrong?
CREATE DATABASE logtest
GO
USE logtest
GO
CREATE TABLE test (field varchar(100))
GO
CHECKPOINT
[Code] ....
Here is my code,
1. create table t1 (id int )
2. create unique index u on t1(id)
3. create table t2 (id int constraint f foreign key references t1(id))
4. ALTER TABLE t2 NOCHECK CONSTRAINT ALL
5. ALTER TABLE t1 NOCHECK CONSTRAINT ALL
6. drop index t1.u
I get a FK voilation exception. on line 6.
I was not expecting this, because I am doing 4 & 5
Is dropping the FK is only option?
Actually I am trying to move the unique index to a different file group.
------------------------
I think, therefore I am - Rene Descartes
Just a quick easy question. If I alter a table (add a column to the table), will it take the table offline during the ALTER process? I am adding the column to the end of the table not in the middle. I know if I add it in the middle it will offline the table.
View 4 Replies View RelatedHi,
I am trying to drop an index usiong enterprise manager.The process hangs and Enterprise manager is not responding.When I checked the Current activity the process is in sleeping condition.I appreciate if any one can tell me what could be the reason for the process to be hung.
thanks
Mohan
Hi,
I have a table which I am unable to drop the index.
I tried to drop it via the TSQL and GUI interface (Indexes dialog box),
but when I clicked on table refresh, the index still there.
Below is the result after DBCC commands:
1. DBCC checktable(TB_LOCLoan)
Checking TB_LOCLoan
The total number of data pages in this table is 146542.
Table has 1596232 data rows.
Msg 605, Level 21, State 1
Attempt to fetch logical page 462136 in database 'DM_LOCLoan' belongs to object '1744009244',
not to object 'TB_LOCLoan'.
2. DBCC newalloc(DM_LOCLoan)
TABLE: TB_LOCLoan OBJID = 832005995
INDID=0 FIRST=60168 ROOT=642778 DPAGES=146542 SORT=0
Data level: 0. 146542 Data Pages in 18393 extents.
INDID=5 FIRST=463752 ROOT=463739 DPAGES=5304 SORT=1
Msg 2525, Level 16, State 1
Table Corrupt: Object id wrong; tables: alloc page 463616 extent id=463752 l page#=463752
objid in ext=-832005995 (name = -832005995) objid in page=832005995 (name = TB_LOCLoan)
objid in sysindexes=832005995 (name = TB_LOCLoan)
TOTAL # of extents = 18393
3. From Error Msg 2525, I have tried the suggested action
use DM_LOCLoan
go
select indid, name, object_name(id)
from sysindexes
where id=832005995
and distribution=463752
go
This query does not return any row.
I am running out of clue of how to proceed! Anybody come across this problem before?
I am very eager to solve this problem as the table is hanging here, I can't even drop it to recreate
and continue data loading.
Thank you.
Regards,
Joo Pheng
According to sysindexes, I have a table with a primary key and an index. I'd like to drop the index. However, when I give the drop command, the message "Cannot drop the index 'eventlog._INDEX', because it does not exist in the system catalog." is returned.
I'm not sure what to look for. How do I remove the index?