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New Computed Column

This dialog appears when you click Menu > Column > New Computed Column, or click New Computed column in the Query Editor. It helps you to create functions quickly and easily instead of having to write formulas.

The following are details about options in the dialog:

Computed Column Name

Specifies the name of the computed column.

Functions

The functions here are not from JReport system. They are from the connected database you are using. Thus, if you change your data source, some of these functions may no longer exist. For each database, the different supported functions list will be returned.

• String
  Specifies String formulas to create a function.
• Numeric
  Specifies Numeric formulas to create a function.
• Time & Date
  Specifies Time or Date formulas to create a function.
• +
  Adds the numbers or fields together in the Expression menu.
• -
  Subtracts numbers or fields together in the Expression menu.
• *
  Multiplies numbers or fields together in the Expression menu.
• /
  Divides numbers or fields together in the Expression menu.
• =
  Equates fields together.
• "
  Places quotations on long character strings or names that have blanks in them. For example, you should place quotes on values such as "New York" or "Washington DC").
• ||
  Places fields together in the same Expression menu. For example, "New York" || "Washington DC").
• ()
  Places your fields in parentheses.

Table/Column

Lists all the tables and fields which are available for creating the computed column.

OK

Applies all changes and closes the dialog.

Cancel

Does not retain any changes and closes the dialog.

Help

Displays the help document about this feature.

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