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CHAPTER 7 DATABASE BACKUPS, RECOVERY, AND MAINTENANCE
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Include If NOT EXISTS: If you select all the objects to be scripted and set this to true, SQL Server will put a test around each object so that if that object already is in the database when the script is run, it won t be created. There will be no test for specific columns when scripting a table, but there will be a test for the table itself. Script Behavior: You can generate a script for creating items or dropping items. Script Collation: If you wish the SQL Server collation to be scripted, enable this option. Useful if you are unsure of the collation the script will then be run against. Script Database Create: This specifies whether you wish a CREATE DATABASE statement to be scripted or not. Script Defaults: We have some default values that will be set on columns when rows are added. Setting this to true will set these defaults. Script Extended Properties: Extra properties can be placed on every SQL Server object. These will be scripted if you select true. Script Logins: This scripts all Windows and SQL Server authentication logins. Script Object-Level Permissions: Each object will have permissions on who can do what. For example, on a table, permissions on who can add, delete, or select the data can be set up. This option will include these options. Script Owner: This scripts the owner of the database if specified. Script Statistics: This specifies whether to script the SQL Server column and index statistics. It avoids rebuilding them when re-creating the database using the script; however, it will increase the time taken to build the script as well as the size of the script. Script USE DATABASE: Between each object, this specifies whether to script a USE database statement or not. Ideal if used with scripting-dependent objects. Script Check Constraints: This will script check constraints. Script Foreign Keys: Any foreign keys will be scripted. Script Full-Text Indexes: If you have any full-text indexes, this indicates whether you want to script them or not. Script Indexes: This specifies whether to script table and view indexes. Script Primary Keys: This dictates whether to script primary keys or not. Script Triggers: For any trigger, this specifies whether you wish these to be within the script. Script Unique Keys: Any unique keys will be scripted. This concludes our look at the different methods of backing up, restoring, moving, and scripting databases. While this covers every way of ensuring your database structure and data should never be lost, you still need to maintain the database on a regular basis. This is what we will take a look at in the next section of this chapter.
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CHAPTER 7 DATABASE BACKUPS, RECOVERY, AND MAINTENANCE
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At this point, we have now created a backup and performed a restore of the example database. We have also covered the different methods to back up and restore the database. However, we have no real plan for regular maintenance and detection of problems in our database strategy. Any jobs for backup of the database or transaction log that we have demonstrated so far are held as single units of work called steps. Not only that, there is nothing in place that will look after the data and indexes held within the database to ensure that they are still functioning correctly and that the data is still stored in the optimal fashion. Without a process that runs regularly, we would need to perform all of this by hand, regularly. What a waste of time, and boring to boot! This section will demonstrate building a plan and then checking on the plan after it has run to ensure that all has gone well with it. This plan will perform regular backups and checks on the database, and keep it in optimum health. To do this, we will use the Database Maintenance Wizard, which will monitor corruption within the database, optimize how the data is stored, and back up both the database and transaction logs. Finally, the wizard will schedule all of this to occur at regular intervals. Some areas of this chapter, like the backup screens, are straightforward as they were covered earlier in the chapter; however, this now brings the whole maintenance of the database into one wizard.
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