barcode generator project source code in vb.net When you have selected the appropriate databases, click Next. in Software

Painting QR Code in Software When you have selected the appropriate databases, click Next.

When you have selected the appropriate databases, click Next.
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4. Update Data Optimization Information In addition to backing up data, you will probably want to schedule jobs that perform routine maintenance on your databases. The options in the Update Data Optimization Information window (see Figure 6-14) will apply to the databases you have selected in the previous step. Although these jobs take time to perform, it is a good idea to perform them regularly if your business constraints allow. The choices include: s Reorganize Data and Index Pages As the data contained in database objects changes, pages can become fragmented or full. If a page of data is full, new pages must be created to accommodate the additional information. Choosing this option causes all the indexes for a database to be dropped and re-created. The result will be indexes with optimized data layout, allowing queries that rely on them to be executed more quickly. Free space is normally kept on data pages so that some amount of information can change without requiring additional pages to be created. You can choose either to keep the original amount of free space (which is equal to the value specified as the FILLFACTOR) or to reset the free space on each page to a given percentage that you specify. After reorganizing the changes, data modifications through UPDATE and INSERT queries will be faster.
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Figure 6-14.
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Update Statistics Used by Query Optimizer When SQL Server executes a query, it uses information about tables, indexes, and other database objects to find the most efficient way to retrieve and return the data. As data in the database changes, however, the statistics may be out of date. Selecting this option sets the job to sample a portion of the database to update the statistics. For large databases, you ll want to choose a smaller percentage of the database for generating sample statistics, because this will greatly improve performance of the operation. The overall result is a potential increase in the speed of processing SELECT queries. Remove Unused Space from Database Files As we mentioned earlier in this chapter, SQL Server 7 can automatically grow and shrink database files as needed. This results in nearly automated administration of data files. During this operation, you can choose to have SQL Server automatically remove any slack space space that is available on the disk for the data files, but that does not contain any useful information. Because removing unused space requires processing and disk I/O time, you can specify how much unused space must be present before the operation occurs and how much unused space should be left in the database after the operation is complete. Schedule You can specify when this job will run by clicking the Change button next to the Schedule field. The Edit Recurring Job Schedule dialog box appears:
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Here you can specify when operations will occur. Notice that you can select almost any regularly occurring schedule using this dialog box. We ll see the same interface in subsequent job scheduling steps of the wizard.
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Performing Database Backups
After you make your selections, click Next. 5. Database Integrity Check On this page (shown in Figure 6-15), you can choose to create a job for checking the integrity of the database. If you select Check Database Integrity, the DBCC CHECKDB command (described in the preceding section) will be run. You can choose whether to run the checks on indexes and whether to automatically repair any minor errors that might be found if you do choose to include indexes. Finally, you can choose to perform tests prior to backups. If this option is checked and inconsistencies are found in the database, the files will not be backed up. This prevents the storing of inconsistent data files (which, depending on your backup settings, might overwrite other database backups). 6. Specify the Database Backup Plan Now that we ve selected the performance and consistency checks, it s time to determine how we want to back up the data itself. Figure 6-16 shows this screen. At this point, you can choose to perform all the other operations without backing up the database. Note that if you uncheck this box, no data will be backed up. For backup operations, you can specify whether or not the backup should be verified. This option instructs the
Figure 6-15.
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