Create SA account

① default Login as Windows authentication

② Select the sa account in the login name under Security, right-select the property, and set the related item

③ the corresponding login entry in the status of the SA account is disabled by the previous, changed to Enabled

④ Change the password for SA to the password you need

⑤ the corresponding security by setting the root directory, the server authentication mode, the Windows identity mode, and the Windows Authentication mode to SQL Server, and the window auth modes (if not modified, will result in the corresponding SQL Server authentication mode input box is all gray, cannot be entered)

Create SA account