Best way to update/insert/delete in sqlserver database

Hello
I've passed the last days going around with xml, sqlxml, uppdategrams,
diffgrams, transactions, sp's, everything, I suppose, but still have
not a clear line of thoughts...
Im new in the info systems world.. I'm currently developing an
windows app in vb.net running over sqlserver 2000. Till now I was
using simple inserts, updates and deletes in db tables (not much so
far) but now that performance and data consistency issues are being
discussed, I was trying to understand the best way to pass data
to/from database.
Clearly I want to have the business logic in server side, being
executed by storedprocedures, but in large updates, inserts and
deletes I must pass many data and that it's a problem.
For an update I was doing something like this:
Try
loTransaction = lcnPlada.BeginTransaction()
lcmActualiza.Transaction = loTransaction
For Each loLinha In tdtActualizaHistorico.Rows
lcmActualiza.CommandText = "insert into
stetiquetahistorico (encomenda,produto,tamanho,cor,etiqueta,etiquetaem issor,dataemissaoetiqueta,etiquetaqtd,ficheiroemis sao)
" & _
"values (" & CType(loLinha(0), Integer) &
"," & CType(loLinha(1), Integer) & ",'" & loLinha(2).ToString & "'," &
CType(loLinha(3), Integer) & "," & CType(loLinha(4), Integer) & ",'" &
Environment.UserName & "','" & Now & "', " & CType(loLinha(5),
Integer) & "," & tnNumeroEmissao + 1 & ")"
lcmActualiza.ExecuteNonQuery()
Next
loTransaction.Commit()
Return True
end try
But have logic (a for each) inside a transaction its not a good idea,
right?
I've seen many different examples of adodb objects constructing a
stream with the xml statements that executes a sp and maps the table
columns to perform updates or inserts and then
adodb.command.commandstream = stream
adodb.command.execute
and in server side creates a sp that
sp_xml_preparedocument
...
insert...
sp_xml_removedocument
Sqlserver books online has an example of it that works correct in
northwind database but what about using sqlcommand? or
sqlxmlcommand?
Can I use a sqlxmlcommand to execute a stream that was written in
code, instead of using templates?
Is there other ways than sqlxml to perform this kind of tasks?
Anybody can help me, please?
Thanks in advance
sp_xml_preparedocument/OpenXML is a T-SQL feature. So it is independent of
what client you are using to connect to the database. Steps are:
1. Write your stored proc to do the logic
2. Use the normal way that your client requires to pass arguments and
execute the stored proc.
You only need the command stream object if you are using FOR XML to get XML
back from the server.
HTH
Michael
"?scar Martins" <subdueme@.hotmail.com> wrote in message
news:229f0a23.0410141120.1efff3b8@.posting.google.c om...
> Hello
> I've passed the last days going around with xml, sqlxml, uppdategrams,
> diffgrams, transactions, sp's, everything, I suppose, but still have
> not a clear line of thoughts...
> Im new in the info systems world.. I'm currently developing an
> windows app in vb.net running over sqlserver 2000. Till now I was
> using simple inserts, updates and deletes in db tables (not much so
> far) but now that performance and data consistency issues are being
> discussed, I was trying to understand the best way to pass data
> to/from database.
> Clearly I want to have the business logic in server side, being
> executed by storedprocedures, but in large updates, inserts and
> deletes I must pass many data and that it's a problem.
> For an update I was doing something like this:
> Try
> loTransaction = lcnPlada.BeginTransaction()
> lcmActualiza.Transaction = loTransaction
> For Each loLinha In tdtActualizaHistorico.Rows
> lcmActualiza.CommandText = "insert into
> stetiquetahistorico
> (encomenda,produto,tamanho,cor,etiqueta,etiquetaem issor,dataemissaoetiqueta,etiquetaqtd,ficheiroemis sao)
> " & _
> "values (" & CType(loLinha(0), Integer) &
> "," & CType(loLinha(1), Integer) & ",'" & loLinha(2).ToString & "'," &
> CType(loLinha(3), Integer) & "," & CType(loLinha(4), Integer) & ",'" &
> Environment.UserName & "','" & Now & "', " & CType(loLinha(5),
> Integer) & "," & tnNumeroEmissao + 1 & ")"
> lcmActualiza.ExecuteNonQuery()
> Next
> loTransaction.Commit()
> Return True
> end try
> But have logic (a for each) inside a transaction its not a good idea,
> right?
>
> I've seen many different examples of adodb objects constructing a
> stream with the xml statements that executes a sp and maps the table
> columns to perform updates or inserts and then
> adodb.command.commandstream = stream
> adodb.command.execute
> and in server side creates a sp that
> sp_xml_preparedocument
> ...
> insert...
> sp_xml_removedocument
> Sqlserver books online has an example of it that works correct in
> northwind database but what about using sqlcommand? or
> sqlxmlcommand?
> Can I use a sqlxmlcommand to execute a stream that was written in
> code, instead of using templates?
> Is there other ways than sqlxml to perform this kind of tasks?
> Anybody can help me, please?
>
> Thanks in advance

Best way to replicate huge transactions

We do nightly processing for our warehouse data on Server A and we replicate
the data after all the processing to Server B.
What is the fastest way to push this data across ? Right now it seems like
it takes more than an hour to push all the changes across.i.e an hour
latency. We are using trans replication. Any parameters we can tweak to push
the data faster or are there any other techniques.
Please advice.. Thanks
Hassan,
this article quantifies the effects of using most of the available
parameters:
http://www.microsoft.com/technet/pro.../tranrepl.mspx
Rgds,
Paul Ibison SQL Server MVP, www.replicationanswers.com/default.asp
(recommended sql server 2000 replication book:
http://www.nwsu.com/0974973602p.html)
|||replicate the execution of stored procedures if
1) your stored procedures modify more than one row at a time
2) the bulk of your batch operations use procs
consider using merge replication if
1) your batch operations modify the same row many times, ie a stock market
application.
2) use download only exchangetype
Hilary Cotter
Looking for a SQL Server replication book?
http://www.nwsu.com/0974973602.html
Looking for a FAQ on Indexing Services/SQL FTS
http://www.indexserverfaq.com