What Are Cons And Pros For Using IDENTITY Property As PK In SQL SERVER 2000?
Jul 20, 2005
Hi All!
We are doing new development for SQL Server 2000 and also moving from
SQL 7.0 to SQL Server 2000.
What are cons and pros for using IDENTITY property as PK in SQL SERVER
2000?
Please, share your experience in using IDENTITY as PK .
Does SCOPE_IDENTITY makes life easier in SQL 2000?
Is there issues with DENTITY property when moving DB from one server
to another? (the same version of SQL Server)
Thank you in advance,
Andy
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May 22, 2002
My company is thinking about moving to a product that uses Microsoft SQL Server and I have been asked to find out what are the Pros and Cons of the product, if any.
Any feedback is appreciated.
Thank You
Pam
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Aug 13, 2001
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Thanks.
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Nov 3, 2005
I have a requirement where I need to perform a query for positioninformation. But for some types of entries, I need to "expand" the rowto include additional position rows. Let me explain with an example:An index is a security that is made up of components where eachcomponent has a "weight" or a number of shares. So if I have 1 share ofthe index, I have X shares of each component.AAPL is an Equity, CSCO is an Equity, SPY is an Index. Lets say thatSPY has one component, AAPL, with shares being 10. (1 share of SPY = 10shares of AAPL).So, I do some trading and I end up with positions as follows:+10 AAPL-5 CSCO+2 SPYThe query I need returns:+10 AAPL-5 CSCO+2 SPY+20 AAPL (from 2 SPY * 10 shares)which becomes (after grouping):+30 AAPL-5 CSCO+2 SPY-----------------------------------------Based on that criteria and the following schema (and sample data):-- Drop tablesDROP TABLE [SecurityMaster]DROP TABLE [Position]DROP TABLE [IndexComponent]-- Create tablesCREATE TABLE [SecurityMaster] ([Symbol] VARCHAR(10), [SecurityType] VARCHAR(10))CREATE TABLE [Position] ([Account] VARCHAR(10), [Symbol] VARCHAR(10), [Position] INT)CREATE TABLE [IndexComponent] ([IndexSymbol] VARCHAR(10), [ComponentSymbol] VARCHAR(10), [Shares] INT)--Populate tablesINSERT INTO [SecurityMaster] VALUES ('AAPL', 'Equity')INSERT INTO [SecurityMaster] VALUES ('MSFT', 'Equity')INSERT INTO [SecurityMaster] VALUES ('MNTAM', 'Option')INSERT INTO [SecurityMaster] VALUES ('CSCO', 'Equity')INSERT INTO [SecurityMaster] VALUES ('SPY', 'Index')INSERT INTO [Position] VALUES ('001', 'AAPL', 10)INSERT INTO [Position] VALUES ('001', 'MSFT', -5)INSERT INTO [Position] VALUES ('001', 'CSCO', 10)INSERT INTO [Position] VALUES ('001', 'SPY', 15)INSERT INTO [Position] VALUES ('001', 'QQQQ', 21)INSERT INTO [Position] VALUES ('002', 'MNTAM', 10)INSERT INTO [Position] VALUES ('002', 'APPL', 20)INSERT INTO [Position] VALUES ('003', 'SPY', -2)INSERT INTO [IndexComponent] VALUES ('SPY', 'AAPL', 25)INSERT INTO [IndexComponent] VALUES ('SPY', 'CSCO', 50)INSERT INTO [IndexComponent] VALUES ('QQQQ', 'AAPL', 33)-- *****************************-- Based on the rules:-- 1) Index positions appear like other positions (account /symbol) pair, but-- its components show up as new rows of account (of index),symbol (equal--to component symbol), position (equal to shares * index position)-- 2) One row for each account / symbol pair (GROUP BY account andsymbol, SUM position)-- Expected output (without grouping) (sorted by account / symbol)-- 001 AAPL 10-- 001 AAPL 375 (component shares * index position) (25* 15) (SPY)-- 001 AAPL 693 (component shares * index position) (33* 21) (QQQQ)-- 001 CSCO 10-- 001 CSCO 750 (component shares * index position) (50* 15) (SPY)-- 001 MSFT -5-- 001 QQQQ 21-- 001 SPY 15-- 002 AAPL 20-- 002 MNTAM 10-- 003 AAPL -50 (component shares * index position) (25* -2) (SPY)-- 003 CSCO -100 (component shares * index position) (50* -2) (SPY)-- 003 SPY -2-- Expected output (with grouping account / symbol) (sorted by account/ symbol)-- 001 AAPL 1078-- 001 CSCO 760-- 001 MSFT -5-- 001 QQQQ 21-- 001 SPY 15-- 002 AAPL 20-- 002 MNTAM 10-- 003 AAPL -50-- 003 CSCO -100-- 003 SPY -2---------------------------------------------Is a UNION the best way to perform the query. What are the pros andcons? What, if any, is a better way?SELECT[Account], [Symbol], SUM([Position]) AS [Position]FROM(SELECT[Account], [Symbol] , [Position]FROM[Position]UNION ALLSELECTP.[Account] , IC.[ComponentSymbol] AS [Symbol] , (P.[Position] *IC.[Shares]) AS [Position]FROM[IndexComponent] ICJOIN[Position] PONP.[Symbol] = IC.[IndexSymbol]) DGROUP BY[Account], [Symbol]ORDER BY[Account], [Symbol]
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Jul 20, 2005
Hi alli am building a SQL 2000 database that it is proving a littlechallenging, i have companies with multiple addresses, phone numbers,owning mine sites etc and also joint ventures so maybe you get thepicture with a few design issues that i ma encounteringMy queriy is about a primary key identity, and which one to use withrespect to either the identity data type or the unique identifier ,I am aessentiall building an address table to hold all multipleaddresses as well as phone numbers etc, so my desire to have a uniqueidentity for each record is very important.My view is i will run in to violation errors by just using the tableidentity data type, i could i suppose use composit primary keys butthat may have a performance impact, although thiis will not be a hightransaction database.Does anyone know about performance issues regarding each identitysolution, by using a generated 16 bit identifier there are going to behuge numbers for the DB to verify. or am i worried about nothing?any views greatly appreciatedregardsGreg
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It seems to me that either by accident or design, SQL Server tends to steer you away from backing up directly over the network.
Are there reasons for not doing this because you obviously don't want to leave your backups on a local drive in case the drive fails?
Some possibilties that I can think of are:-
1. Local drives have faster access times and SQL backups can get quite large. I did a quick test and found that a netwrok backup takes 2 to 3 times longer than it does on a local drive.
2. Backing up on the netwrok could hog too much bandwidth. I haven't tested this and would be surprised it it's true.
3. There could be some reason that you don't want the Server and Agent services running under a domain account but want to leave them on the Local System account. I am not aware of any such reasons by the way.
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Also, we will be integrating Community Server into this Web site. Of
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We were thinking of giving CS its own database also; bad practice, or....it doesn't matter much?
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table1[pkey1,col1,col2,col3] -->pkey is pkey1
table2[pkey2,pkey1,col11,col12,col13]--->pkey is pkey2, and pkey1 is foreign key
CaseI->select table2.pkey2,table1.col1 ,table2.col12
from table1 inner join table2
on table1.pkey1=table2.pkey1
where (table1.col3>100 and table1.col3<300 ) and table2.pkey1=2020 and table2.col13 is not null
CaseII->select table2.pkey2,table1.col1 ,table2.col12
from table1 inner join table2
on table1.pkey1=table2.pkey1
where (table1.col3 between 101 and 299 ) and pkey1=2020 and table2.col13 is not null"
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Oct 26, 2007
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Jun 19, 2008
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Apr 2, 2007
hi
i export tables from Local to Online Server But some tables have a column with Identity=True
But after export tables that Property is not True How I can change it True With Query Analyzer????????/
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Jul 6, 2007
Hello friends,
I am using sql server 2005. In some tables to create the column Autoincrement I had set the 'Idetity Specification' property to 'Yes'. I want to know that how can we do it through sql scripts i.e. by writing query.
Please let me know
Thanks & RegardsGirish Nehte
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Dec 19, 2001
Hi,
I have a VB script that I am using to run various DTS procedures. One of these involves using DataPumpTransformCopy to copy data from one table to another. The destination table has an Identity field that I would like to disable for the duration of the Transform.
I have tried opening a Command Object and running the "SET IDENTITY_INSERT" function beofre and after the Transform but although it doesn't produce any errors it doesn't seem to actually do anything...
I figure I need to try using the ALTER TABLE to disable the IDENTITY but I can't find an example of how to do this anywhere.. can anyone help me out here?
Many Thanks,
Seoras
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Jul 23, 2004
How can i remove identity property of a particular table with sql command.
Thanks.
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Oct 20, 2006
I assume that the identity property is stored within a given database, so there should be no need to run dbcc checkident after restoring from a backup. Is this a correct assumption?
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May 24, 2005
Is there a way to remove the Identity property of a column in SQL Server 2000?
The statement:
<code>
ALTER TABLE <table name> ALTER COLUMN <column name> DROP IDENTITY
</code>
returns a syntax error.
Thank you,
Jeff
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Oct 24, 2000
Hi,
Please let me know if it is possible to replicate a table with identity property defined in it. Both the publisher and subscriber tables have identity property defined. Which option should be used while setting up transactional replication to allow the identity values at the publisher pushed to the subscriber, which also has identity property defined? Not for replication option with the identity property also fails. Whichever option I choose I get the error, 'An explicit value for the identity column in table 'jobs_id_nfr' can only be specified when a column list is used and IDENTITY_INSERT is ON.' This works only if the identity property is not defined at the subscriber. But, I need to have the identity property defined at the subscriber also because the subscriber should be an exact copy of production.
Thanks in advance,
Praveena
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Mar 2, 2004
Has anybody ever tried to do this. I can't figure it out. All I want to do is take an existing table that already has values in the column that I want to change and add the identity property to yes and set the identity seed and increment to a specific number. I know you can do it in the CREATE TABLE statement but is there a way to use the ALTER TABLE command?
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Apr 9, 2008
Hi all,
Have anyone faced the timeout issue when setting a IDENTITY property of a column to NO.
Is there any way to resolve it ?
Note : The table on which I'm doing the operation is having approx 50 million records.
Thanks,
Hariarul.
I get the below error :
'TrnBillDetail' table
- Unable to modify table.
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
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Sep 28, 2007
How to remove an Identity property for an Identity Column
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Aug 1, 2007
Is there any way to remove IDENTITY property on particular table? I tried removing IDENTITY property using Manangement studio, but this operation behind the scene use migration concept that is by creating tmp table and then populating with data; droping the orginal and renaming the tmp back to original.
Second, i want some kind of generic solution using certain system table like aya.sysobjects, sys.identitycolumn etc such a way that i should be able to remove the idenity property from all of the table accross a database.
Mandip
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Mar 19, 2008
How do i Find all Columns that have Identity Property in a database. That is i will like to know all columns in a database that are identity columns.
I am using SQL Server 2005. Thanks
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Mar 30, 2006
Hi All,
Can any body tell me that how we can attach IDENTITY property to an existing int column
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Jul 20, 2005
i need to alter all foreign keys in my database and uncheck the"Enforce relationship for replication" check box. Using the EM, Iextracted the code snippet below. unfortunately, when i run this testfrom query analyzer, then go back into the EM, the box is stillchecked.can anyone tell me what i am missing? any advice on unsetting thisattribute globally would be appreciated!BEGIN TRANSACTIONSET QUOTED_IDENTIFIER ONSET TRANSACTION ISOLATION LEVEL SERIALIZABLESET ARITHABORT ONSET NUMERIC_ROUNDABORT OFFSET CONCAT_NULL_YIELDS_NULL ONSET ANSI_NULLS ONSET ANSI_PADDING ONSET ANSI_WARNINGS ONCOMMITBEGIN TRANSACTIONALTER TABLE dbo.CustomerCustomerDemoDROP CONSTRAINT FK_CustomerCustomerDemo_CustomersGOCOMMITBEGIN TRANSACTIONALTER TABLE dbo.CustomerCustomerDemo WITH NOCHECK ADD CONSTRAINTFK_CustomerCustomerDemo_Customers FOREIGN KEY(CustomerID) REFERENCES dbo.Customers(CustomerID) NOT FOR REPLICATIONGOCOMMITthanks!!
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Mar 7, 2008
How do i drop/remove the identity property for an existing column in all Tables where the Identity column is a primary key.
The Script below was used to find all the tables that have an Identity Column as a primary key in a database. Now i want to remove the identity property from the Identity Columns that have a primary key in the database.
select pk.table_name, c.column_name,
from information_schema.table_constraints pk
INNER JOIN information_schema.key_column_usage c ON c.TABLE_NAME = pk.TABLE_NAME
and c.constraint_name = pk.constraint_name
where constraint_type = 'PRIMARY KEY'
and COLUMNPROPERTY(object_id(pk.table_name), column_name, 'IsIdentity') = 1
ORDER BY pk.table_name, c.column_name
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