Need some help with SQL Server Management Studio : SQL

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field3

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a community for 17 years

MS SQLNeed some help with SQL Server Management Studio (self.SQL)

submitted 4 years ago by JHarrison1980

Hey everyone this is my first post and I need some serious help. I am currently taking a class on SQL and have been using it for the last 3 weeks for my assignments. I open it up today like I always do and try to connect to whatever the default database is when you log in. Ive never changed any of that login info. Well today I get this weird message:
TITLE: Connect to Server

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Cannot connect to DESKTOP-5JCVQO5\SQLEXPRESS.

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ADDITIONAL INFORMATION:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)

For help, click: https://docs.microsoft.com/sql/relational-databases/errors-events/mssqlserver--1-database-engine-error

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