Regarding Identity Column Value Retreival

Feb 21, 2005

Hi,

I am working on a .NET project for order manangement system. There will be multiple users accessing the application simultaneously. We have primary key columns as identity columns in most of our tables in our database. When we create new records, in our SPs we are doing an insert and to get the value of the Primary Key immediately after the insert, we are retrieving the last inserted identity value and using it in the rest of the procedure.

Which one is the best to retrieve the value of the record just inserted - @@Identity, Scope_Identity OR Ident_Current

We should have the right column value considering there will be multiple inserts in the tables precisely at the same, say, micro second. There should be no overlaps where the id value generated for one user/session etc should not be retrieved for another user or session etc.

Please let us know what is the best to use in our condition.

Thanks
oursmp

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Problem In Using Sqlbulkcopy To Insert Data From Datatable(no Identity Column) Into Sql Server Table Having Identity Column

Jun 19, 2008

Hi,
I am having problem in bulk update of a sql server table haning identity column from a datatable( has no identity column) using sqlbulkcopy. I tried several approaches, but it does not show any error nor is the table getting updated. But the identity value seems to getting increased every time.
thanks.
varun

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Transact SQL :: Alter Non Identity Column To Identity Column

Aug 12, 2009

when i alter non identity column to identity column using this Query alter table testid alter column test int identity(1,1) then i got this error message Msg 156, Level 15, State 1, Line 3 Incorrect syntax near the keyword 'identity'.

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SQL Mobile - SQLCEResultSet - Fast Retreival

May 23, 2007

Hi,

I am trying to develope a Pocket PC application using MS Visual Studio 2005 (C#)and the database is in the device (.sdf file).

Am trying to retreive a single row from a table containing around 10000 rows. I would like to know the fastest method to retreive the values.

whether it is faster to use an SQLDataAdapter to retreive the values to a dataset or datatable OR retreive the values to a SQLCEResultSet OR is there any other faster retreival method.

Please advice

Thanks,

Anujith

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How To Setup A Many-to-many Schema To Favor Retreival Speed.

Oct 30, 2006

I'm am novice in the RDMS world. I would like to set up a database that will scale with a large dataset of over 1,000,000 unique records. In a nutshell, I have about a million+ documents that are stored on a file server as TIFF files. Each document has 2 or more persons (names) associated with that document like "John Smith" or "Mr. John Doe" etc.. A person can be related to many documents (depending on how many transactions they conducted over the years) and any document can be related to many people as most of the transactions were from multiple sellers and multiple buyers. The end users almost always searches for documents by using the first and last name of the person related to the document along with other document fields such as DATE and TYPE to narrow the search. I would like to design and index the database for fast searching as updates are not as time sensitive. I think I need at least 3 tables:

1) NAME_TABLE normalized into NameID(PK) NameFirst, NameMiddle and NameLast

2) DOC_TABLE normalized into DocID(PK), DocTransNum, DocFilePath, DocDate, DocType, (and other attributes)

3) NAME_DOC table to relate the above two tables in a many to many relationship.

My questions are: Where should I put the field that identifies the person as a buyer or seller as it relates to the document? John Smith can be both a buyer and seller on different documents so I don't think it belongs in the NAME table. If I have a another table that splits the names into SELLER_NAMES and BUYER_NAMES it would create some duplicate names and increase the search time right? I want to search for a document using a name and the option to specify if the person name search is limited to buyers, sellers or both. Do I need to do anything special in setting up the tables for fast searching other than indexing all the name fields and the DocID field? What indexing needs to be done on the many-to-many table if any? If fast searching on a mostly static database is a top requirement, should I denormalize the document table to include the names even though there will be duplicate names throughout? How large of a test set of records do I need to load to see any real deltas in performance as I modify and tweak?

Sorry for all the questions but I believe they are related to the overall problem to solve.

Regards,

DeBug

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Jan 25, 2015

I have table of three column first column is an ID column. However at creation of the table i have not set this column to auto increment. Then i have copied 50 rows in another table to this table then set the ID column values to zero.

Now I have changed the ID column to auto increment seed=1 increment=1 but the problem is i couldn't figure out how to update this ID column with zero value set to each row with this auto increment values so the ID column would have values from 1-50. Is there a away to do this?

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Identity...I Need To Get The Last (or Highest Number In Identity Column)...

Sep 19, 2005

Ok,I just need to know how to get the last record inserted by the highestIDENTITY number. Even if the computer was rebooted and it was twoweeks ago. (Does not have to do with the session).Any help is appreciated.Thanks,Trint

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Aug 1, 2014

I'm working with a third-party database (SQL Server 2005) and the problem here is the following:

- There are a bunch of ETL processes that needs to insert rows on a table (let's call this table T) and at the same time, an ERP (owner of T) is up and running (reading, updating and inserting on T).

- The PK of T is an Integer.

Today all ETL processes uses (select max(ID) + 1 from T) to insert new rows, so just picture the scenario. It is a mess! Everyday they get duplicate key error when 2 or more concurrent processes are trying to insert a row (with the max) at the same time.

Considering that I can't change the PK, what is the best approach to solve this problem?

To sum up:

* I need to have processes in parallel inserting on T

* I can't change anything on T

* The PK is NOT an Identity

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Oct 16, 2006

Hi all,

The requirement is to have a table say 'child_table', with an Identity column to refer another column from a table say 'Parent_table'..

i cannot implement this constraint, it throws the error when i execute the below Alter query,

ALTER TABLE child_table ADD CONSTRAINT fk_1_ct FOREIGN KEY (child_id)
REFERENCES parent_table (parent_id) ON DELETE CASCADE

the error thrown is :
Failed to execute alter table query: 'ALTER TABLE child_table ADD CONSTRAINT
fk_1_ct FOREIGN KEY (child_id) REFERENCES parent_table (parent_id) ON DELETE
CASCADE '. Message: java.sql.SQLException: Cascading foreign key 'fk_1_ct' cannot be
created where the referencing column 'child_table.child_id' is an identity column.

any workarounds for this ?

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Sep 7, 2007

Hi guys,
If I have a temporary table called #CTE
With the columns
[Account]
[Name]
[RowID Table Level]
[RowID Data Level]
and I need to change the column type for the columns:
[RowID Table Level]
[RowID Data Level]
to integer, and set the column [RowID Table Level] as Identity (index) starting from 1, incrementing 1 each time.
What will be the right syntax using SQL SERVER 2000?

I am trying to solve the question in the link below:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2093921&SiteID=1

Thanks in advance,
Aldo.

I have tried the code below, but getting syntax error...

ALTER TABLE #CTE
ALTER COLUMN
[RowID Table Level] INT IDENTITY(1,1),
[RowID Data Level] INT;

I have also tried:

ALTER TABLE #CTE
MODIFY
[RowID Table Level] INT IDENTITY(1,1),
[RowID Data Level] INT;

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Jan 9, 2007

Hello;
My Memebership table has Guid column as Primary key.
But I would like to add Auto numbering Identity column to this table.
Is this idea OK or it will bring some problems?
Thank you in advance for your help

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Aug 3, 2006

i have a table
table1
column1 int not null
column2 char not nul
column3 char

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Mar 5, 2004

Hi,

I have a column that is unique that I would like to make into an IDENTITIY column after I insert some data into it.

I tried

alter table <table_name>
alter column <col_name> int Identity (1,1)

but it fails.

Ajay

WORD4LIFE
(http://www.word4life.com)

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Jul 20, 2005

Hi(SQL Server 2000)I have an existing table (t) with a column that is NOT an identity column(t.ID), but it has manually inserted "row numbers". I want to make thiscolumn become an identity column. This column is a key field to othertables, so I want to keep the row numbers that are allready inserted.From the Query Analyzer, how do I do this?Thanks in advance!Regards,Gunnar V�yenliEDB-konsulent asNORWAY

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Apr 2, 2007

Hi,

I have two tables table1 and new_table

Table1 has id_value column which is int and it is idenity specification is yes and identity increment is 1 .

And I have a NEW_TABLE with column name new_id which should store current id_value of Table1.

This type of functionality is requirement for my project.

I should get a current value of id_value from table1 . if I say SELECT * FROM NEW_TABLE ;

Please help me out to fix this issue

Thanks

Purnima

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Change An Int Column To Identity Column

Dec 17, 2001

Hi, I want to change an int column (not null) to identity column. I tried
the following:

alter table myTable alter column ID int identity(10, 1) not null

But it failed with the error message:

Incorrect syntax near the keyword 'identity'.

Can someone please show me the correct statement (if it exists)>

Many thanks.

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Nov 8, 2007

I have been trying to get the new sol_id that is added so I can use it in other code, but it is only returning 0. The new record is getting added to the table, but my varaiable myNewSolID is 0 in my response.write(myNewSolID)
I appeaciate any help!
Here is my steored procedure and my code:
ALTER PROCEDURE [dbo].[AddTrackings]

@DropDate datetime,
@Comment nvarchar(100),
@DateEntered datetime,
@EnteredBy nvarchar(50),
@Sol_ID Int OUTPUT
AS
INSERT INTO tblTrackings (DropDate, Comment, DateEntered, EnteredBy)

VALUES (@DropDate,@Comment,@DateEntered,@EnteredBy)

SET @Sol_ID=SCOPE_IDENTITY()

RETURN

Sub ProcessTracking()
Dim myNewSolID As Integer

Dim ConnectStr As String = _
ConfigurationManager.ConnectionStrings("2ConnectionString").ConnectionString

Dim MySQL As String = ""

If Me.chkDropSave.Checked Then
MySQL = "AddTrackings"
Dim MyConn As New SqlConnection(ConnectStr)
Dim Cmd As New SqlCommand(MySQL, MyConn)
Cmd.CommandType = CommandType.StoredProcedure
Dim InsertedInteger As New SqlParameter("@Sol_ID", SqlDbType.Int)
InsertedInteger.Direction = ParameterDirection.Output
Cmd.Parameters.Add(InsertedInteger)

Dim MySqlParamStart As New SqlParameter("@DropDate", SqlDbType.DateTime)
Cmd.Parameters.Add(MySqlParamStart)
MySqlParamStart.Value = Me.BasicDatePickerDropDate.SelectedValue

Dim MySqlParamAmtTo As New SqlParameter("@Comment", SqlDbType.NVarChar, 100)
Cmd.Parameters.Add(MySqlParamAmtTo)
MySqlParamAmtTo.Value = Me.txtComment.Text

Cmd.Parameters.AddWithValue("@DateEntered", Now())
Cmd.Parameters.AddWithValue("@EnteredBy", Profile.UserName)

Try
MyConn.Open()
myNewSolID = Cmd.ExecuteScalar()Response.Write(myNewSolID)

Catch ex As Exception
Response.Write(ex.Message)
Finally
MyConn.Close()
End Try

Else
End If
End Sub

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Hi to all, Using sql query i want to check whether the column is Identity column or not? Please members reply me.

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Having an identity column in target table, how do I use SQL 7 DTS ?

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In DTS package, had Fast load and Enable Indenity checked - no luck !

Unchecked Enable identity, do luck.

What would be the standard procs for this since this sounds like a very common
senario.
What I am expecting is to insert from source and SQL would take care identity column automatically.
Appreciate your help very much !

-Ivan

--------------------------------------------------------------------------------

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Sep 17, 2001

I want to know how to reset the identiy column when i delete a row from the existing table.

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Thanks in advance,

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