Table Writeback - Calculated Columns

Last updated About 4 hours ago

Calculated columns allow you to add a new, custom data value to every single row in a table based on an expression or formula.

Note: Unlike in BI Book Planning, calculated columns can't yet be saved to the database for further data modeling. This is on our roadmap.

Adding a calculated column

Table Writeback supports two types of calculated columns:

Numeric — formula can only reference numeric fields
String — formula can reference any field

To add a calculated column, click + in the action panel, then select Manage Calculated Columns:

Click “Add”:

Specify:

calculated column name
column type (numeric/text)
calculated column formula
- To select columns for your dropdown, double-click the column in the list on the right.
- Formula syntax
  Column references are written in square brackets: [ColumnName].
  Numeric formulas support the operators +, -, *, / and parentheses ( ).
```
([Quantity] * [UnitPrice]) - [Discount]
```
  Empty or non-numeric source values are treated as 0. When the column type is Numeric, only numeric columns can be used; non-numeric columns appear in red in the Available columns list and cannot be inserted.
  Text formulas join values with & and use quotes for literal text:
```
[FirstName] & " " & [LastName]
```

As a result calculated columns are added at the end of the table but you can change the column order if you would like to (manage table’s columns):

Editing or deleting a calculated column

To edit or delete a calculated column, click + in the action panel, then select Manage Calculated Columns. Click a column to select it, it'll highlight to confirm.

Press either “Edit” or “Delete” button respectively: