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It is recommended that you place checkmarks in both Restart Services checkboxes so that SQL Server and SQL Server Agent will be restarted in case they stop unexpectedly. When events occur on this SQL Server, you can configure them to be forwarded automatically to another machine. We ll look at multiserver management later in this section. The third set of options is used to define when an idle time has occurred. As we mentioned earlier, jobs can be scheduled to occur when the SQL Server is idle. Here, you can specify the maximum percentage of CPU utilization and how long the server must remain below that level before a job is fired. Be sure to set reasonable values, because if the settings are too high, your jobs may never run. s Alert System Whenever a SQL Server alert is fired (described later in this section), SQL Server Agent must know who to contact and how they should be notified. On this tab, you can specify the format for pager e-mails and

SALES_FACTS product_ salesrep_ quantity_ day_key key key sold 2991 2991 2991 2991 201 201 201 201 100 101 102 10 10 10 10

- 124 -

SALESREP salesrep_ key 100 101 102 salesrep_ type Associate Associate Manager salesrep_ name Paul Cook Steve Jones Glen Matlock

define settings for a fail-safe operator. The fail-safe operator is notified if all the other notification events fail. Before being able to choose a person for this value, you need to define operators (which we ll cover next). s Job System In this tab, you can choose to limit the size of the job history log. This prevents the log from growing to unmanageable sizes and using up unnecessary disk space. If you need to keep information for historical reporting, however, you might want to disable this option or increase the number of rows to be saved. You can also specify how long SQL Server Agent will wait for a job to finish if a shutdown request is received. You can view information about the Master server if multiserver administration is configured and this server is configured as a Target server. Finally, you can set security options for the CmdExec commands. This is a very important setting, since users with access to CmdExec will be able to perform any functions on this server by using operating system commands. By checking the box, you can ensure that only members of the sysadmin role will have this permission. Connection In this tab, you can specify the login information that SQL Server Agent will use when connecting to SQL Server. You can use either Windows NT authentication or specify a SQL Server login and password. Note that these logins should be given System Administrators permissions for servers on which they need to run jobs. If you ll be using applications or scripts that require connection options, you can specify the name of the server in the Local Host Server setting. Choices for this item can be configured using the SQL Server Client Configuration utility.

minor table. The objective is to retain rows containing NULL foreign key values (like Tom Snyder's) from the child table in the query results, so the child table becomes the major table in the outer join. It doesn't matter whether the query is actually expressed as a left outer join (as it was previously) or as a right outer join like this: List the salespeople and the cities where they work. SELECT NAME, CITY FROM SALESREPS, OFFICES WHERE OFFICE =* REP_OFFICE NAME ------------Tom Snyder Mary Jones Sam Clark Bob Smith Paul Cruz Dan Roberts Bill Adams Sue Smith Larry Fitch Nancy Angelli CITY --------NULL New York New York Chicago Chicago Chicago Atlanta Los Angeles Los Angeles Denver

Figure 6-9

3. When you re satisfied with the existing options, click OK to save the changes. Note that if you changed the service account, SQL Server Agent may need to be stopped and restarted before the changes take effect. Once SQL Server Agent is appropriately configured, you can begin to assign it tasks to perform. Let s move on to setting jobs, operators, and alerts.

dealing with NULLs also come into play. Even if NULL is not stored in the dimension, it will be necessary to test for it: