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There's the really bad practice of select *. You really should use column names though.
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Given the other replies - what is it that you are trying to do - maybe we can provide some other advice?
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Hi all,
I've been trying to find a similar question but couldn't find one so forgive me if this has already been dealt with.
Is there a way that I can immediately obtain the value of an auto incrementing identity field in SQL if I insert a new record?
Let's say I run the following command:
SqlCommand myCommand = new SqlCommand("INSERT INTO Users (UserName, Age) VALUES ('Joe Bloggs', 30)", myConnection);
but the Users table has an auto incrementing identity field called UserID. Is there a way I can obtain the new value of UserID without having to run a subsequent SELECT UserID FROM Users WHERE... query?
Thanks
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After the INSERT do: SELECT SCOPE_IDENTITY();
This is all in one command. So you then do a ExecuteScalar() to get the value back to your application.
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You could also use a SELECT @@identity;. But I think that it's better to use the Scope_Identity()-function, because @@identity returns the last identity value set in the current connection, while Scope_Identity() returns the last identity value that was set in the current scope (e.g. in a stored procedure).
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Tobias Schoenig wrote: You could also use a SELECT @@identity;. But I think that it's better to use the Scope_Identity()-function, because @@identity returns the last identity value set in the current connection, while Scope_Identity() returns the last identity value that was set in the current scope (e.g. in a stored procedure).
Yes, so if there there are triggers involved then SCOPE_IDENTITY() will ensure the correct identity is returned.
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Brilliant! Thanks guys, much appreciated.
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Hi friends..I am using SQL 2005..
I have table field id and bid_amount
id bid_amount
1 2000
1 2500
1 2200
2 2000
2 1500
here how get the rank for individual id...I want to display like
id bid_amount Rank
1 2500 1
1 2200 2
1 2000 3
2 2000 1
2 1500 2
plz help me urgent.....
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Google is a wonderful tool. I searched for 2 seconds and found this[^].
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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gubba wrote: my question is that is there any method that we can retreive the values not using the colmn names but the column numbers.
I don't think so. You can define aliases for the columns though, e.g. SELECT Option_1 AS [1], Select Option_2 AS [2] etc...
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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Hi,
i insert new row in sql server with this syntax
Dim insert_transaction As SqlCommand
insert_transaction = New SqlCommand("insert into Transaction (Transaction_Id,Account_Id,Type,Amount,Date,Time) values ('30','" & account & "','Account Transfer','" & money.Text & "','" & Today & "','" & time & "')", myConnection)
insert_transaction.ExecuteNonQuery()
the error appear in ExecuteNonQuery()
the question is
how i insert new row in vb.net connect with sql server ?
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the error "Icorrect synyax near the keyword 'Transaction'" and i have table transaction in database
and anther question : how can insert primary key ( Transaction_Id) automatic without i insert it manual
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declear the field Transaction_Id as identity and write the query with @@IDENTITY AS ID
like this
insert_transaction = New SqlCommand("insert into [Transaction] (Transaction_Id,Account_Id,Type,Amount,Date,Time) values ('30','" & account & "','Account Transfer','" & money.Text & "','" & Today & "','" & time & "') @@IDENTITY AS ID ", myConnection)
object autonumber = insert_transaction.ExecuteScalarIdentity()
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1. new error appear :"there is no source code available for the current loaction
if i click yes the same last error appear"
2. and I'm not understand the how declare the @@IDENTITY , and if declare it there is no meaning for insert value for transaction_Id
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Try it this way:
insert_transaction = New SqlCommand("insert into [Transaction] (Transaction_Id,Account_Id,Type,Amount,Date,Time) values ('30','" & account & "','Account Transfer','" & money.Text & "','" & Today & "','" & time & "')", myConnection)
The word Transaction has a special meaning to most databases.
Having said that, it would be a great deal better if you used parameters in your query, as your current query leaves your database open to SQL injection.
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Hi All,
Is there any Query to Export Table to Xml File Using Sql Server?
Plz Suggest Me ...
Thx in Advance
Nagaraju
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In MS SQL Server 2000 there is a "FOR" clause which you can use to retrive the select query result in xml. Basic syntax is as follows,
<br />
FOR XML mode [, XMLDATA] [, ELEMENTS][, BINARY BASE64]<br />
<br />
Arguments<br />
XML mode<br />
<br />
Specifies the XML mode. XML mode determines the shape of the resulting XML. <br />
mode can be RAW, AUTO, or EXPLICIT.<br />
<br />
XMLDATA<br />
<br />
Specifies that an XML-Data schema should be returned. The schema is prepended to the document as an inline schema.<br />
<br />
ELEMENTS<br />
<br />
If the ELEMENTS option is specified, the columns are returned as subelements. Otherwise, they are mapped to XML attributes. This option is supported in AUTO mode only.<br />
<br />
BINARY BASE64<br />
<br />
If the BINARY Base64 option is specified, any binary data returned by the query is represented in base64-encoded format. To retrieve binary data using RAW and EXPLICIT mode, this option must be specified. In AUTO mode, binary data is returned as a reference by default.<br />
Example : Select * from TableName for xml auto
You can search the SQL transact help for further details.
Nothing is Impossible. Even impossible spells "i m possible"
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Thanks Maharishi,
But I need to Save the whole table Data into a xml file which is to be created with a sql query.
means
Select * from TableName to "c:\test.xml"
I need a query to send whole sql table to cml file
is there any way to do like that?
thx..........
Nagaraju
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I don't know wether you can achieve this with a sql statement, but if your're using a .NET-application , to send the SQL Statement, you could do the following:
- Fill a DataSet via SqlDataAdapter with the output of your Select-statement
- Write the data to a xml-file using the DataSet.WriteXML()-method.
This would solve your problem in a very easy way, but if you really need to do that in one sql-statement I haven't got the faintest idea.
Tobias
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Hi,
For that you will need to write a PL/SQL for this kind of stuff. In MS SQL 2000/2005 there is an extended stored proc named xp_cmdshell which can be used to access the windows command line which can be used to save file. I have got an example which you can use for this...
DECLARE @FileName varchar(50),
@bcpCommand varchar(2000)
SET @FileName = 'c:\data.txt'
SET @bcpCommand = 'bcp "SELECT * FROM TableName for xml auto" queryout "'
SET @bcpCommand = @bcpCommand + @FileName + '" -U sa -P pwd -c'
EXEC master..xp_cmdshell @bcpCommand
But for this kind of extended proc access the procedure has to run in 'sa' context... or you need administrator rights to do that...
Hope this helps
Maharishi
Nothing is Impossible. Even impossible spells "i m possible"
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I want to connect to a database and retrieve and insert data which is in another server.which means the database is not in our server.
it may be in another server globally remote.
this is about an asp web application.
please reply me as soon as possible
dayya <gmherath@gmail.com>
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Either set your remote server up as a linked server in SQL Server or write a web service to access it.
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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