I am new to writing SQL code and I read that you can use ALTER statements to create an index for a table. How would I go about doing that? Everything that I have tried in Query Analyzer comes up with an error.
Any help is appreciated.
How to script all the PK/FK/constrainnts/indexes with create and drop statements?
As you know, we can't script 'drop statements' for primary keys etc..
Any help in giving me a script which does all the above is greatley appreciated..
Thanks,
Di.
For large databases is it a good idea to create indexes for fields that are used in Where statements? Does that improve performance and reduce overhead?
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Hi,
I am using VB.NET 2005 and set up an ODBC connection via ODBC.ODBCConnection to a MDB database. Therefor, I use the "Microsoft Access ODBC Driver (*.mdb)".
When I set up a ODBCCommand like "ALTER DATABASE..." or "CREATE TABLE..." and issue it with the com.ExecuteNonQuery() command, I get an error from ODBC driver, that a SQL statement has to begin with SELECT, INSERT, UPDATE or DELETE.
How can I use DDL statements via ODBC?
I would appreciate if you could help me to use ODBC for that - no OLE, no ADO.
Thanks for help!
Regards,
Stefan D.
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?
Hello ,
I am having a problem related to Alter table syntax in MS SQL Server .
What I want to do is in a single alter table statement I want to add as well as modify columns in a table.
For E.g.
alter table testtable add fld1 numeric(10),
alter column fld2 numeric(15)
But I am getting an error.are these kinds of statements possible in MSSQL server ?I was able to do so in Oracle.I just wanted some confirmation or examples of whether this is possible in MS SQL Server also.
Fast Help would be extremely appreciated.
Thanks,
Anand
I was checking out an indexes property via SQL 2005 Management Studioand it looks like I can move the index to other filegroups via thedrop down.I checked the BOL ALTER INDEX and I didnt see an argument for thisaction. I see stuff about PARTITION, but I think that is for rowpartitioning??I want to move existing indexes from the PRIMARY filegroup to a newfile group just for indexes, which is called INDEXES.Can this be done via ALTER INDEX or some other way?TIARob
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In SQL Server 2000 one could DBReindex every index that exists in a given database. You can do the same in SQL Server 2005. But how can this be done with the new Alter Index command? It does not allow me to pass in a variable for the object. Any ideas on how to get this done in with Alter Index in 2005? Thanks!
This I can't get to work:
DECLARE
@TableName nvarchar(100)
SET @TableName = 'Account'
USE database;
GO
ALTER INDEX ALL ON @TableName
REBUILD
GO
USE RZTQ5OL02
DECLARE @TableName varchar(255)
DECLARE TableCursor CURSOR FOR
SELECT Name from sys.sysobjects where type = 'U'
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @TableName
WHILE @@FETCH_STATUS = 0
BEGIN
DBCC DBREINDEX(@TableName,' ',90)
FETCH NEXT FROM TableCursor INTO @TableName
END
CLOSE TableCursor
DEALLOCATE TableCursor
I created a cursor that moves through a table to retrieve a user's name.When I open this cursor, I create a variable to store the fetched name to use within the BEGIN/END statements to create a login, user, and role.
I'm getting an 'incorrect syntax' error at the variable. For example ..
CREATE LOGIN @NAME WITH PASSWORD 'password'
I've done a bit of research online and found that you cannot use variables to create logins and the like. One person suggested a stored procedure or dynamic SQL, whereas another pointed out that you shouldn't use a stored procedure and dynamic SQL is best.
I want to use Create a procedure if not exisit and Alter it if exisit.
Can I use Create and Alter keyword together while writing a procedure in SQL Server 2005? If YES than HOW?
When creating the indexes on the table, SQL 7.0 also created some type of system indexes ( ex. _WA_Sys_curr_int_rate_2C88998B nonclustered, statistics, auto create located on PRIMARY, etc. ). I want to know how can I clear up these system indexes.
View 1 Replies View RelatedSlayer writes "Probably a really lame question but in the absence of our DBA I have been asked to create a couple of indexes on a table. No problem with that, just need to know if this is a safe operation whilst users are using the database.
Thanks for your help"
Thought I should post in the newbie forum for a while, instead. :-)
I have a couple of scripts that I've generated that drop a couple of system stored procedures and recreate them. I'm not sure why I did it in the first place, but I think it was that it wouldn't let me run an ALTER statement on them. Specifically, I'm now looking at sp_add_operator. I changed it to a 500 character email field instead of whatever it was (100, I think.)
/* Explanation: Why did I do that? SQL Mail is prohibited here, so I'm using CDO_Sysmail to email myself and the developers if a job fails. The list of people to email is determined by the owner of the database, who is also an operator in SQL. I get the list of emails from the email field of the operator properties. Hence, I need a bigger email field. Yes, I now know it would most likely be better to create an ADMIN database on each server for this kind of stuff. (Thanks to Tara for that blogged suggestion.) */
While I will probably go back to the default stored procedure, this got me to thinking: when would it be better to use an ALTER statement on a SProc rather than to do a DROP and CREATE?
Your thoughts, oh SQL gurus?
when i create a new stored proc, i say "CREATE PROCEDURE [sprocName]"
but the next time i edit the stored proc, it hasnt changed to "ALTER ..."
I manually change it to ALTER, and run it, and close it, and it reverts back to "CREATE..."
Is there some sort of privelage i have to enable? Has anyone encountered this before?
Help guys, please :-S
Also, if you know of a better place where i can post this thread, please let me know
Hello,
A few months ago, the company I work for switched to SQL 7.0 from 6.5. All is running fine but recently I noticed that we have a ton of indexes on each table that start like this: _WA_SYS_....0B679CE2 (here are some specific examples: _WA_SYS_PRODUCT_LINE_0B679CE2, _WA_SYS_RMA_DISPOSITION_0B679CE2)
Did SQL 7.0 do this? If so why? What is it trying to do? Why doesn't it use current indexes (clustered and non-clustered)? Why don't they get Fragmented like User defined indexes? I have a lot of questions associated with this if someone can explain it.
Tech Net, MSDN, BOL and other manual resources don't mention anything about it. At least I haven't found anything on it and I have spent some time looking.
Please help if you can.
Troy
1)When we create Indexes, key columns are the columns that use in where clause and included columns are the columns that can be used in the select list and on join clause column.
2) I am thinking that we have to create new Index, only if we found at least 50 msec time save.
I found out how to create clustered index using TSQL, but how can you create clustered index and manage indexes using SQL Server Management Studio?
Thanks
Goldmember
Hi,I have a new job. It needs to drop and re-create (by insert) a tableevery night. The table contains approximately 3,000,000 (and growing)records. The insert is fine, runs in 2 minutes. The problem is thatwhen I create the indexes on the table, it is taking 15-20 minutes.There is one clustered index and 11 non-clustered. This is a lookuptable that takes many different paremeters, so it really needs theindexes for the user interface to run efficiently. However, thedatabase owners aren't keen on a job taking 20 minutes to run everynight.Any ideas?
View 5 Replies View RelatedFirst, I'd like some help stablishing if it's a good idea or not what I'm thinking, and second is what would be the easyist way to achive the result.
Background. We have a multicompany ERP system (200GB, 200+ tables). All data tables have a companyid, counter1id, counter2id, fields. Each table has a primary clusterd index on these fields in that order. And also has multiple other indexes that usually include companyid filed first. ( Note we have 10 companies, ids are 1..10, companies 2 and 5 are the most active, inserts, selects ). MY GUESS IS THAT THIS IS VERY BAD HAVING COMPANYID FIRST. AM I CORRECT? LEADS TO AL LOT OF FRAGMENTATION? VERY BAD TO FIND DATA ON THE INDEXES?
I want to re-create all my indexes and have them counter2id, companyid, counter2id. ( counter1id is a counter for each company, and counter2id is a global counter like identity ) GOOD OR BAD IDEA?
Since I have hundreds of indexes what is the correct procedure? I was thinking on scripting the database, then dropping all indexes, then recreate clustered indexes, then recreate other indexes. Do I have to take care of anything else foreing relationships, etc.
I have some problems getting my SSIS package to run in a transaction, I wonder if anyone can assist.
What I want to do is run one package, which consists of a
- 1) create staging table SQL statement
- 2) read (all) from Access MDB to staging
- 3) copy (only new) from staging table to real table
- 4) drop the staging table
I changed the package to "require" a transactions, and left all containers in it to "supported" (default, I think). I left all the transaction type to default "serializeable".
The package does not work, since the table I created on step one is not "seen" when step 2 wants to insert into it. If I set the package transaction back to "supported" (default) the package works, but an error on step 2 or 3 will not rollback changes and not remove the staging tables...
So, my question really is: How do I make step 1 results visible to step 2 in the same transaction? Or do I need to take a completly different approach for this?
Stupid question I think, but I seem to not be able to find the right way to handle this situation...
Thanks for reading!
Ralf
Hi
I have written stored procedures to create a database with db name as input parameter
I need to create a batch file to run the stored procedure with input value given in the command prompt along with the batch file will be my dbname, which will be used by the stored procedure to create the databse.
and also few sql statements to insert data into those tables after creating
Plz could any one help me out to create code to create a batch file
thanks in advance
Anyone have any compelling arguements for using one over the other?
Thanks
Mercy
Here is the alter statement that I am trying to use to create a relationship between 2 tables. This does not seem to work on mobile. What am I doing wrong?
ALTER TABLE [SubCategory] CONSTRAINT [FK_SubCategory_Category] FOREIGN KEY([CategoryID])
REFERENCES [Category] ([CategoryID])
ON UPDATE CASCADE
ON DELETE CASCADE
Hi everyone,
I know that statistics called _WA_... are created on tables when auto create statistics is set on a database. Is this an indication that queries against the table would perform better if indexes were created on the columns in question? (The tables I'm interested in optimising are used equally for transactional querying and reporting)
Thanks for any replies!
Les
is there a function that i can use in a store procedure that allow me to create an Indexes/Keys Property
thanx
With help of others on this group, I've been learning and researchingabout indexes; an area I neglected.I see I can specify which filegroup I wish to create an index, whichthe default is Primary.I have more than one drive in my SQL server where I put data and logson their own logical raid groups.My databases are SIMPLE, so they dont use much, if any logs (none as Iunderstand).I was thinking of adding an additional file to my database and use itsolely for the indexes.Any thoughts?SQL Server 2005 Enterprise x64 SP28 disk SAS Raid 1+0 w/ 512mb ram w/ battery backup.Thanks,Rob
View 2 Replies View RelatedI have a pretty large database that has tables that will contain millions of rows of records. I will predominantly be using Views just to select the data. (I will not be performing any updates or inserts). I propose creating indexes on the views. My question is - if I create indexes on my views, do I have to create them on the tables as well? Is it good practice to create indexes on tables by default even if I am not going to be performing select statements directly on my tables but via my indexed views? Any advice is appreciated.
Thanks
Ran
Does anyone have any SQL that will look at a DB and dynamically generate CREATE INDEX statements? I
know I can use EM but I want to make this a scripted process and you can only generate CREATE INDEX statement if
you script out the tables too.
Any Ideas??
Thanks
MySql has a statement like:
SHOW CREATE TABLE tablename;
that returns the precise CREATE TABLE statement for the specified tablename.
Sql Management Studio also allows scripting Create Statement for any object by right-clicking it.
But I want to do this programatically, and fetch CREATE statements for Tables, Procedures & Views.
How can I retrive CREATE statements for Database objects progrmatically in Sql Server???
Without giving dbowner how can we grant permission to user to alter/create procs?
View 3 Replies View RelatedHi,How Can I create a case sensitive unique index so that A1 and a1 are treatedas different ?I dont mind if I have to make a global DB change.Steve
View 1 Replies View RelatedI use Indexes Fundamentals of Microsoft SQL Server - Lesson 30: Indexes in the website of URL... to learn the basic things of Indexes. In my SQL Server 2012 Management Studio (SSMS2012), I executed the following code..
-- scFTX_CreateTableEmployees.sql
-- saved in C:/Documents/SQLServerIndexes_downloadCode
-- 26 May 2015 10:52 AM
USE ScottChangDB;
GO
CREATE TABLE Employees
[code]....
Where the SCHEMA and the index 'IX_Employees are located in the Object Explorer of the database "ScottChangDB" of my SSMS2012.
Although writing a parameterized SQL statement has been simplified using the asp:parameter options, it still may benefit to use the old fashioned method of writing a sql statement using an input string. I have noticed this for wanting to make a parameter to select which table I want to pull from. Here is some code I wrote to pull information from a database based on input from a search box and write it to a gridview.
Partial Class Private_SearchResultsInherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim Table As String
Dim SearchString As StringSearchString = Request.QueryString("SearchString")
Table = Request.QueryString("Table")
If Len(Trim(SearchString)) > 0 ThenSelect Case Table
Case "Plant"
SqlDataSource1.SelectCommand = "SELECT PlantName as 'Plant',PlantAddr as 'Address',PlantCity as 'City',PlantState as 'State',PlantCountry as 'Country',PlantZip as 'ZIP' FROM Plant WHERE PlantName LIKE '%" & SearchString & "%' OR PlantCity LIKE '%" & SearchString & "%' OR PlantState LIKE '%" & SearchString & "%' OR PlantCountry LIKE '%" & SearchString & "%' OR PlantZip LIKE '%" & SearchString & "%' ORDER BY PlantName"
Case "Contacts"
SqlDataSource1.SelectCommand = "SELECT ContactPosition as'Position',ContactTitle as 'Title',ContactLast as 'Last Name',ContactFirst as 'First Name',ContactPhone as 'Phone No' FROM Contacts WHERE ContactLast LIKE '%" & SearchString & "%' OR ContactFirst LIKE '%" & SearchString & "%' OR ContactPosition LIKE '%" & SearchString & "%' OR ContactPhone LIKE '%" & SearchString & "%' OR ContactTitle LIKE '%" & SearchString & "%' ORDER BY ContactLast"
Case "Events"
SqlDataSource1.SelectCommand = "SELECT EventName as 'Event',CONVERT(varchar,EventStartDate,101) as'Start Date',CONVERT(varchar,EventEndDate,101) as 'End Date',EventNotes as 'Notes',EventNoAttendees as 'Attendees',EventType as 'Event Type' FROM Events WHERE EventName LIKE '%" & SearchString & "%' OR EventStartDate LIKE '%" & SearchString & "%' OR EventEndDate LIKE '%" & SearchString & "%' OR EventNotes LIKE '%" & SearchString & "%' OR EventNoAttendees LIKE '%" & SearchString & "%' OR EventType LIKE '%" & SearchString & "%' ORDER BY EventName"
Case ""
Label1.Text = "Nothing Selected in Drop Down Box"
End Select
Else
Label1.Text = "No Search Parameters Entered"
End If
GridView1.DataBind()End Sub
End Class
Here is also my code to the front end of the page...
<%@ Page Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="SearchResults.aspx.vb" Inherits="Private_SearchResults" title="Search Results" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
<strong><span style="font-family: Tahoma">Search Results<br />
<br /></span></strong>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">
<asp:Label ID="Label1" runat="server" Font-Names="Tahoma" Font-Size="10pt"></asp:Label><br />
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" DataSourceID="SqlDataSource1" Width="1020px">
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" Font-Names="tahoma" Font-Size="Small" />
<EditRowStyle BackColor="#999999" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="Indigo" Font-Bold="True" ForeColor="White" Font-Names="tahoma" Font-Size="Small" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" /></asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:CRMConnectionString %>"></asp:SqlDataSource>
</asp:Content>