Why is my Go application failing to connect to SQL Server?

Go with SQL Server driver is unable to connect successfully, login fail

In this context, the issue lies in attempting to connect to a SQL Server database using the Go programming language and the go-mssqldb driver, but encountering a login failure. This is often caused by authentication issues, such as incorrect credentials, improper SQL Server configuration, or .

To resolve this issue, it is necessary to ensure several things:

1. Correct Authentication Method: Verify that the connection string includes the correct authentication method. If using SQL Server authentication, provide a valid "user id" and "password". If using Windows authentication, leave the "user id" and "password" fields empty and use the option "integrated security=true".
2. SQL Server User Permissions: Ensure that the SQL Server user specified in the connection string has appropriate permissions to access the database. This typically involves granting the user "db_datareader" and "db_datawriter" permissions for the desired database.
3. TCP/IP Enabled: Confirm that TCP/IP protocol is enabled in SQL Server Configuration Manager under "SQL Server Network Configuration" -> "Protocols for MSSQLSERVER".
4. Updated SQL Server Version: Verify that your SQL Server version is up-to-date, especially if the error message mentions SSL encryption issues. Updates may include fixes for login issues.
5. Proper Connection String: Ensure that the connection string provided in Go code matches the correct server name, database name, port (if non-default), and authentication details (as mentioned in point 1).

If these steps still fail to resolve the issue, further investigation may be required to troubleshoot network connectivity issues or firewall configurations that could be blocking the connection.

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