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1. To prove that leading spaces are removed by the LTRIM() function, we have to change the value within our local variable. On top of that, we have to put a string prefixing the variable to show that the variable has had the spaces removed. DECLARE @StringTest char(10) SET @StringTest = ' Robin' SELECT 'Start-'+LTRIM(@StringTest),'Start-'+@StringTest 2. We produce two columns of output, as shown in Figure 11-30: the first with the variable trimmed and the second showing that the variable did have the leading spaces.

Figure 7-22. Maintenance Plan Wizard, first screen 3. Enter a suitable name and description for the maintenance plan. You can then choose the server that the maintenance plan is on. This covers instances when your Management Studio is connected to more than one server. For example, if you have a connection to your ISP that you have a SQL Server installation on, you would change the server to that location. The server you are connected to will be the default. Select the authentication method you wish the plan to connect to the server as, as shown in Figure 7-23.

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The definition of a fixed database role is a listing of specific permissions conveyed by membership in a role. You can generate such a list by executing the sp_dbfixedrolepermission system-stored procedure. This system-stored procedure takes the name of a fixed database role for which you seek a list of permissions, and you can specify this with the output returned from the sp_helpdbfixedrole system-stored procedure. The following listing shows the execution of the sp_dbfixedrolepermission system-stored procedure for both db_datareader and the db_datawriter fixed database roles. As you can see, the db_datareader role conveys a single permission, but this permission has broad applicability in that it allows SELECT statements against any of several database objects that permit SELECT statements, including tables, views, and table-valued functions. The db_datawriter role endows its members with the permission to perform DELETE, INSERT, and UPDATE statements against any object that will allow the use of these statements again, including tables, views, and inline table-valued functions. Both the db_datareader and db_datawriter fixed database roles apply a permission to all the objects within a database. Therefore, if you need to apply SELECT, DELETE, INSERT, and UPDATE permissions for some but not all tables, views, and inline table-valued functions, these fixed database roles are not appropriate. You can apply individual permissions for specific database objects in these kinds of scenarios. EXEC sp_dbfixedrolepermission 'db_datareader'

RIGHT()

Figure 7-23 Selecting the server for the maintenance plan 4 The next screen brings you to a set of choices of actions that you wish the plan to perform In our plan, we will be performing every action with the exception of cleaning up the history of the database We will add this option later when showing how to modify a plan Select the options in the as shown in Figure 7-24, and click next Each of the options are briefly described here: Check Database Integrity: This executes SQL Server database integrity checks on the data and structure of the database both physical and logical Shrink Database: The transaction log is truncated and logically shrunk The database is also shrunk Reorganize Index: As data is inserted and deleted, fragmentation of indexes can take place This will reorganize the index a bit like completing a disk defrag.

DbFixedRole Permission ------------- ------------------------------db_datareader SELECT permission on any object

Rebuild Index: Instead of just reorganizing the indexes, it is possible to drop and re-create them Update Statistics: Statistics are kept to aid the execution of queries These can get out of date if you don t have the option set on to keep these up to date, and this option can update them at this point Clean Up History: This removes historical information such as job history, for a set period of time Execute SQL Server Agent Job: This executes a predefined SQL Server agent job Figure 7-24 has this selected just so you can see the screen it displays later in the example However, as I don t cover jobs within this book, when doing this yourself, leave this unchecked Back Up Database (Full): As discussed earlier, this will back up the full database.

The opposite of LEFT() is, of course, RIGHT(), and this function returns a set of characters from the right-hand side.

EXEC sp_dbfixedrolepermission 'db_datawriter'

Permission ------------------------------DELETE permission on any object INSERT permission on any object UPDATE permission on any object

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