Excel's Formula - sisman

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Part II: Using Functions in Your Formulas
Figure 9-25: Using the DSUM function to sum a table using a criteria range.
Inserting Subtotals
Excel’s Data➜Outline➜Subtotal command is a handy tool that inserts formulas into a worksheet
database automatically. These formulas use the SUBTOTAL function. To use this feature, your
database must be sorted because the formulas are inserted whenever the value in a specified
field changes. For more information about the SUBTOTAL function, refer to the sidebar, “About
the SUBTOTAL function,” earlier in this chapter.
When a table is selected, the Data➜Outline➜Subtotal command is not available.
Therefore, this section applies only to worksheet databases. If your data is in a table
and you need to insert subtotals automatically, convert the table to a range by using
Table Tools➜Design➜Tools➜Convert To Range. After you insert the subtotals, you can
convert the range back to a table by using Insert➜Tables➜Table.
Figure 9-26 shows an example of a range that is appropriate for subtotals. This database is
sorted by the Month field, and the Region field is sorted within months.
This workbook, named nested subtotals.xlsx, is available on the companion
CD-ROM.
To insert subtotal formulas into a worksheet database automatically, move the cell pointer anywhere
in the range and choose Data➜Outline➜Subtotal. You will see the Subtotal dialog box, as
shown in Figure 9-27.