如何找出 SQL 服务器默认实例名称？

Question

I have three SQL server instances on my computer. How can I find out which is the default one?

var conn = new SqlConnection("Data Source=.;Initial Catalog=SampleDb;Integrated Security=True")

I want to learn when I use '.'as above which database I will use.

Answer 1

You can only have more than one instance per OS installation if all of them have different instance names. The data source property has the format

HOST\INSTANCENAME

You are connecting to the default instance (of which there can only be one).