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System Restore generally saves one to three weeks' worth of restoration checkpoints. The number of restoration checkpoints available at any given time is limited by the amount of space you allocate to the System Restore function. The maximum space you can allocate is approximately 12 percent. Restoring your computer restores Windows XP and the programs that are installed on your computer to the state they were in at the time of the selected restore checkpoint. Your personal files (including your saved documents, e-mail messages, Address Book, Internet Explorer Favorites, and History list) are not affected. All the changes made by System Restore are completely reversible, so if you don't like the results, you can restore the previous settings and try again. In this exercise, you will see how to restore your computer to a previous state. Troubleshooting System Restore restarts your computer, so be sure to close any open programs before running it.

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Exporting Data from SQL Server To export data from SQL Server, complete the following steps:

1. Open the Data Transformation Services Import/Export Wizard by clicking Start, All Programs, Microsoft SQL Server, and then Import And Export Data. Click Next. 2. On the Choose A Data Source page, shown in Figure 19-8, select Microsoft OLE DB Provider For SQL Server from the Data Source drop-down list.

Figure 19-8.

3. Select (local) from the Server drop-down list. 4. Select Use Windows Authentication unless you need to specify specific credentials for the database you are exporting. 5. Select the database you want to export data from using the Database drop-down list. Click Next. 6. On the Choose A Destination page shown in Figure 19-9, select a destination format. The destination options will vary depending on the output format you select. Click Next.

There are no practice files for this exercise. Follow these steps: 1. Log on to Windows, if you have not already done so. 2. Close any open programs. 3. On the Start menu, point to All Programs, point to Accessories, point to System Tools, and then click System Restore. Tip You can also access System Restore by clicking Undo changes to your computer with System Restore in the Help and Support Center, or by opening Control Panel from the Start menu, clicking Performance and Maintenance, and then clicking System Restore in the See Also area. 4. The System Restore Wizard starts:

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Figure 19-9.

7. On the Specify Table Copy Or Query page shown in Figure 19-10, you can choose whether to copy whole tables and views or to use a SQL query to filter the data. Click Next.

Figure 19-10.

5. 6. Click Restore my computer to an earlier time, and then click Next. The Select a Restore Point page opens, displaying a calendar. The days on which restoration checkpoints were created are indicated on the calendar by a bold date. Troubleshooting You can move to different months by clicking the arrows on either side of the month name. These arrows are active only when restoration checkpoints exist in the previous or next months.

The Specify Table Copy Or Query page of the DTS Import/

8. If you selected Copy Tables And Views From The Source Database, you ll see a list of the available tables and views in the source database. Select the check boxes next to the tables or views you want to export, as shown in Figure 19-11. If you selected a query, you get a

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page that lets you enter a SQL query, or you can use the Query Builder to build the query interactively.

Figure 19-11.

7. Click each of the bold dates to see the checkpoints that were created on that day:

9. Select a row in the list of tables and click Preview to see the data in the source table that will be exported. Click OK to close the View Data dialog box and then click Next in the wizard. 10. On the Save, Schedule, And Replicate Package page shown in Figure 19-12, select the Run Immediately check box to run the export immediately.

Figure 19-12.

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