SQL Server 2016 Express版和开发人员版在同一台计算机上

Question

I have installed SQL Server 2016 Express edition and Developer edition on the same machine, but when I use SSMS to login, and type

select @@version

only express edition is shown, why?

SSMS login method

sql server configuration manager as follow:

Answer 1

The two instances will have a separate instance name - and you can connect to only one at a time.

By default, the SQL Server Express will use SQLEXPRESS as its instance name, while Developer edition will default to the unnamed instance.

You can connect:

• to SQL Server Express by using (local)\\SQLEXPRESS as your server/instance name
• to SQL Server Developer by using (local) as your server/instance name

Both should be available - and again, those are the default instance names - you may have changed those to something else during installation, and in that case, you have to use those values you used, of course.

UPDATE: to find the instance names, go to your SQL Server Configuration Manager (from the start menu), and look at this screen:

Find the SQL Server services that are running - in parenthesis behind the "SQL Server", you see the instance names - in my case SQL2014 and SQL2016 . The MSSQLSERVER is the default, unnamed instance that you can connect to using just (local) (or your IP address) without specifying an instance name

Update #2: examining your screenshot, it seems like you're using the default instance names - none (unnamed default) instance - which is most likely your developer edition, and SQLEXPRESS which is the default for SQL Express.

So if you login to (local) and run SELECT @@VERSION - do you get the Developer edition? And if you login to (local)\\SQLEXPRESS and run SELECT @@VERSION , do you get the Express edition?? You might replace (local) with your IP address ...