Install
First go to the official website to download SQLServer and select the Developer version.
After installing SqlServer, you will be prompted to install SSMS, click the button interface to jump to the link: SSMS , select the desired version to download and install it.
Create a new SqlServer login name
First select Windoes authentication to log in. Then find Security
- Login Name in Object Explorer , right-click Login Name, and select New Login Name . You can customize the login name and password in the figure below, and check the rest of the positions as shown in the figure. Then right click on the server and select properties. Set Server Authentication to the option shown in the image below. Finally, right-click on the server, select restart, and when connecting again, you can select SqlServer authentication.
Unable to delete login, error (15434)
2022-8-17 18:45:20:
After closing SSMS, reopen it, log in with another SqlServer authentication login name or Windows authentication login name, and then delete the target login name.