Re: Open SQL 2005 database question

Charlie (jadkins4@xxxxxxxxx) writes:
Shoud a SQL 2005 database remain open in a Visual Basic program, or should
it be opened and closed in every subroutine?

You don't really open or close the database, but you connect and disconnect
from the server.

It's common to do as you say open and disconnect. It's not really cheap to
open a connection to SQL Server. However, the client API maintains a
connection pool, so behind the scenes the connection is open, and is reused
when you connect anew. (If there is no connection for a certain amount of
time, typically 60 seconds, the connection is closed for real.)

Then again, in a two-tier application it's not really any major flaw to
have a global connection that you keep open.


--
Erland Sommarskog, SQL Server MVP, esquel@xxxxxxxxxxxxx

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx
.

Relevant Pages

  • Re: accessing data mining model via web/PDA
    ... Is your OPENROWSET clause connecting to a SQL Server 2000 database? ... Is your SQL Server instance running on the same machine as your Analysis ... i need some> help for the connection string, let say to access the> mining model in the AS. ...
    (microsoft.public.sqlserver.datamining)
  • Re: VB Express SQL Express Remote Connection
    ... Yes I can connect using the SQL Server Management Studio Express Tool. ... I changed my connection to exactly what you specified and it connected. ... I can connect and create databases on the Remote Server ...
    (microsoft.public.dotnet.languages.vb)
  • Re: How to Direct connect with ActiveSync
    ... That won't work because you have a connection string that can't be correct. ... You're saying that the database is, but it's not; ... Server 2000, Visual Studio 2008. ... Again sorry if this should be in another form but you say that SQL Server ...
    (microsoft.public.sqlserver.ce)
  • .Net Scalability problem
    ... I finished a Great project using .Net and SQL Server and .Net Mobile ... Million concurrent users ... So I think that the MTC generate concurrent connection and per ...
    (microsoft.public.sqlserver.connect)
  • Re: Communication Link Failure Error
    ... On disconnection from the network, in my code I changed the connection ... string to use SQLOLEDB and sent a SQL query to SQL server which failed as ... unplug the network cable from the client machine and put the cable ...
    (microsoft.public.data.ado)