# Join to transform table

Performs a left, inner or right join of two transform tables based on one or more matching conditions.
Select which columns from the source and joining tables you wish to retain.
Optionally, add a prefix to the joined columns to avoid name collisions with existing columns, or to annotate the joined columns.

![Transform table join](../../../assets/3d3c3a37f298d617c86a0b9bec1354d0556adbf52ff49322e653671c5706c0f0.webp)

## Input type

Transform table

## Output type

Transform table

## Usage information

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