Can I specify the default SQL Server with two named instances installed? -


i have sql 2005 express installed. installed sql server 2008 r2 , running both instances successfully. named:

  • computername\sqlexpress (2005)
  • computername\install2 (2008)

i trying figure out how specify 2008 instance default server. have tried:

  • data source=.\local; ...
  • data source=.; ...
  • data source=localhost; ...
  • data source=(local); ...
  • data source=127.0.0.1; ...

each time there connection error stating...

test connection failed because of error in initializing provider.  network-related or instance-specific error occurred while establishing  connection sql server. server not found or not accessible. verify  instance name correct , sql server configured allow  remote connections. (provider: named pipes provider, error: 40 - not open  connection sql server) 

i have other developers working on same project , have sql server 2008 r2 installed , able use data source=(local); ... connect without issues.

is there way me define 2008 instance default or local instance?

you can use connection alias. see how to: create server alias use client


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