User manual

Table Of Contents
86 | Creating databases
4. For Field Name, type a name for the field.
See “About naming fields” on page 81.
5. For Type, select Calculation.
You can enter a description of the field in the Comment box.
6. Click Create.
You see the Specify Calculation dialog box.
7. If necessary, for Evaluate this calculation from the context of, choose a table
from the list.
Setting the context for a calculation is only necessary when you’re creating a
calculation field in a source table that has two or more occurrences in the
relationships graph. The source table is the table defined in the Tables tab of the
Manage Database dialog box. The choice you make may affect the calculation
results, particularly if your calculation will include fields in related tables.
8. Build a formula for your calculation.
Click where you want the item to appear in the formula box, then do the
following.
You can also type the formula into the box.
To add a Do this
Reference to a field In the field list, double-click a field name.
To display field names from another table, choose a table from
the table list.
Mathematical or text
operator
In the keypad in the dialog box, click an operator. (Quotation
marks and parentheses are copied to the formula as a pair, with
the insertion point blinking in the middle).
Comparison or logical
operator, or an exponent
For Operators, choose an operator from the list.
φμπ10_υσερσ_γυιδε.βοοκ Παγε 86 Μονδαψ, Αυγυστ 25, 2008 3:59 ΠΜ