Two ways to verify SQL Server

1. Windows authentication: Native connection or trusted LAN connection (usually used in case of forgetting administrator password or doing system configuration).

2. SQL Server Authentication: Use user name, password authentication (recommended).

Enable method: Authenticate with Windows, then right-click root node, security.

3, SA User: SQL Server's highest administrator account, enable method: Root node--security->sa-> General Change the password, the default is to enforce a complex password, you can cancel the "Enforce password policy." The "status" of "login" is checked as "enabled".

4, based on security considerations, do not enable the SA account, but for the database to establish a dedicated limited account of the database.

Two ways to verify SQL Server