# Boolean formula

Create a new column in a transform table using a [formula](../cards-formula-syntax/index.md). Write a mathematical expression returning a boolean value which can reference table columns using `@` (for example, `@column > 0`). You can also use data in your analysis by referencing global identifiers using `$` (for example, `@column > $A`, where $A is a numeric parameter in your analysis).

## Input type

Number, boolean

## Output type

Boolean

## Usage information

| Functionality | Availability |
| --- | --- |
| [Standard Quiver card](../core-concepts/index.md#cards) | Unsupported |
| [Transform table transform](../cards-transform-table/index.md) | Supported |