问SQL Server 2005用户和角色

EN

select u.name as UserName,
  r.Name as RoleName
from sys.database_principals u
join sys.database_role_members m on u.principal_id = m.member_principal_id
join sys.database_principals r on m.role_principal_id = p.principal_id;

   SELECT @sql = '  IF EXISTS (SELECT  * FROM ' + @DatabaseName + '.sys.database_principals a
            JOIN ' + @DatabaseName + '.sys.database_role_members b ON a.principal_id = b.role_principal_id
            JOIN    ' + @DatabaseName + '.sys.database_principals c ON b.member_principal_id = c.principal_id
            WHERE   a.Type = ''R'' AND a.Name = ''' + @CurrentDbRole + '''
            AND     c.type IN ( ''U'', ''S'') AND c.name = ''' + @MappedUser + ''')'                
        + ' BEGIN
                PRINT '''';
                PRINT N''The [' + @MappedUser + '] user is already a member of the [' 
                        + @CurrentDbRole + '] role in the [' + @DatabaseName + '] database. Skipping Role Member creation.''; 
                PRINT '''';
            END
            ELSE
            BEGIN
                PRINT '''';
                PRINT N''Adding the [' + @MappedUser + '] database user as member of the [' + @CurrentDbRole 
                        + '] role in the [' + @DatabaseName + '] database... '';
                PRINT '''';

                USE ' + @DatabaseName +'; 
                EXECUTE sp_addrolemember [' + @CurrentDbRole + '], [' + @MappedUser + '];   

                PRINT '''';
                PRINT ''Completed adding the user to the role.'';
                PRINT '''';             
            END; ';