In SQL Server, the ALTER ROLE statement is used to manage database roles, allowing you to add or drop members from a role. To drop a member from a database role, you can use the DROP MEMBER clause of the ALTER ROLE statement.
Here is the basic syntax to drop a member from a role:
ALTER ROLE role_name
DROP MEMBER member_name;
Example
Suppose you have a role named SalesRole and you want to drop a user named JohnDoe from this role. The SQL command would look like this:
ALTER ROLE SalesRole
DROP MEMBER JohnDoe;
Key Points
- Permissions: You need to have appropriate permissions to alter the role. Generally, you need to be a member of the role you are modifying or have the ALTER permission on the role.
- Role Names: Role names need to be specified without quotes if they do not contain special characters; if they do contain special characters, use square brackets (e.g., [Sales Role]).
- User Existence: Ensure that the user you are trying to drop is actually a member of the specified role; otherwise, SQL Server will return an error.
This method allows you to manage user roles effectively within your SQL databases.