Best practice is to set the default database to a database that the user will use when connecting to SQL Server. Windows logins are considered more secure because of the way the password for the login is stored. The password for a Windows login is stored using true encryption. Where as the password for a SQL Login is not encrypted, instead it is hashed. Because a SQL login is hashed makes it easier to crack the password. By separating the duties of creating and managing Windows logins from managing databases and access to databases, provides an additional security controls to gain access to data stored in SQL Server.
A login can be set up to have access to many databases on an instance if required. A database user is not the same as a login. A login provides to a user or application the ability to connect to a SQL Server instance, whereas a database user provides the login rights to access a database. Each database a login needs access to will require a database user to be defined, except when a login has been given sysadmin rights.
When a login has sysadmin rights, they have access to all database, without being mapped to a database user. This association between a login and a database user is known as a user mapping. User mappings for a login can be created during login creation or later for logins that have already been set up. When I do this, the window in Figure 5 is displayed. A red box shows the list of databases in Figure 5, where my new login can be mapped.
When I do that, the screenshot in Figure 6 is displayed. This interface automatically generates a database user name the same as the login to which it is mapped. There are times when a login has already been created, and it just needs access to one more database. To give the Red-Gate login additional database access, I have a number of options. One option would be to just modify the user mappings by changing the properties on the login. This would be similar to how I just added the user mapping when I created the Red-Gate login.
There are four other types: SQL user without login, User mapped to a certificate, User mapped to an asymmetric key, and Window users. Next, I enter the database user name for the user I am creating. It could be any name, but I prefer to make the database user name match the same name as the login it is associated with. I next map my new users to a login. And then in the Login name box, enter the login for the user. After above introductions, maybe you still have several questions about creating login and database user.
So go on to read this passage. Of course, you could. But "sa" permission is so high that it would be dangerous for database when we use it to login SQL Server. Hence we can create another login user and grant it appropriate permission for SQL Server database.
Q2: How to solve this problem, there is only name for SQL database user, but no login for it? Now let's create a new login. To create a new login, we've two ways, they are:.
Right-click on Logins as in the following. This will open new Login Window as in the following: Here, you've to enter your login Name and types of authentication. If you select authentication type as "Windows authentication", SQL Server will use Windows login that means you don't need to create additional password or any username. If you use "SQL Server Authentication", your login name will be your username and you've set your password in password field as shown below.
So, what are these options??? When we select second type of authentication, SQL Server uses Windows password policies when creating new user credentials. When you check " Enforce password policy " it will follow windows policy. When you check " Enforce password expiration" , SQL Server reminds user to change old passwords and accounts that have expired passwords are disabled. Select the default database for new login.
It is important to understand the security implications when you are creating Logins and Users. Again, Logins allow authentication to get into the instance. Users will be granted access to the databases that you created the Users in. Additionally, it is important to understand what the user will have access to schema that you choose for that User. Another detail to be aware of is since users get database access, you can create a User without a Login.
You can create Users with database and schema access to run scripts as that user and grant different actions to that user such as Select capability and use these Users as access and running tools for specific functionality. If you do, this User will be "orphaned", a User without a Login. Once you are done, hit 'OK' to complete the process.
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