Adding Data An Access database is not a file in the same sense as a Microsoft Office Word document or a Microsoft Office PowerPoint are. Instead, an Access database is a collection of objects like tables, forms, reports, queries etc. that must work together for a database to function properly. We have now created two tables with all of the fields and field properties necessary in our database. To view, change, insert, or delete data in a table within Access, you can use the table’s Datasheet View. A datasheet is a simple way to look at your data in rows and columns without any special formatting. Whenever you create a new web table, Access automatically creates two views that you can start using immediately for data entry. A table open in Datasheet View resembles an Excel worksheet, and you can type or paste data into one or more fields. You do not need to explicitly save your data. Access commits your changes to the table when you move the cursor to a new field in the same row, or whe
Workbook Security in Excel 2010
Workbook Security
We can apply security to the workbook by the concept of protection available in the Review Tab of ribbon. MS Excel's protection-related features fall into three categories.
Worksheet protection − Protecting a worksheet from being modified, or restricting the modifications to certain users.
Workbook protection − Protecting a workbook from having sheets inserted or deleted, and also requiring the use of password to open the workbook.
Protect Worksheet
You may want to protect a worksheet for a variety of reasons. One reason is to prevent yourself or others from accidentally deleting the formulas or other critical data. A common scenario is to protect a worksheet, so that the data can be changed, but the formulas can’t be changed.
To protect a worksheet, choose Review » Changes group » Protect Sheet. Excel displays the Protect Sheet dialog box. Note that providing a password is optional. If you enter a password, that password will be required to unprotect the worksheet. You can select various options in which the sheet should be protected. Suppose we checked Format Cells option then Excel will not allow to format cells.
When somebody tries to format the cells, he or she will get the error as shown in the screenshot below.
To unprotect a protected sheet, choose Review » Changes group » Unprotect Sheet. If the sheet was protected with a password, you’re prompted to enter that password.
Protecting a Workbook
Excel provides three ways to protect a workbook.
Requires a password to open the workbook.
Prevents the users from adding sheets, deleting sheets, hiding sheets, and unhiding sheets.
Prevents users from changing the size or position of windows.
Requiring a Password to Open a Workbook
Excel lets you save a workbook with a password. After doing so, whoever tries to open the workbook, must enter the password. To add a password to a workbook, follow these steps.
Choose File » Info » Protect Workbook » Encrypt With Password. Excel displays the Encrypt Document dialog box.
Type a password and click OK.
Type the password again and click OK.
Save the workbook.
To remove a password from a workbook, repeat the same procedure. In Step 2, however, delete the existing password symbols.
Protecting Workbook’s Structure and Windows
To prevent others (or yourself) from performing certain actions in a workbook, you can protect the workbook’s structure and windows. When a workbook’s structure and windows are protected, the user may not Add a sheet, Delete a sheet, Hide a sheet, unhide a sheet, etc., and may not be allowed to change the size or position of a workbook’s windows respectively.
To protect a worksheet’s structure and windows, follow the below mentioned steps.
Choose Review » Changes group » Protect Workbook to display the Protect Workbook dialog box.
In the Protect Workbook dialog box, select the Structure check box and Windows check box.
(Optional) Enter a password.
Click OK.
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