# Coalesce
##  Coalesce
### Description
The Coalesce transform lets you list multiple fields and returns the first non-null value.
| Hop Engine | ✓ |
| ---------- | ------------ |
| Spark | ? |
| Flink | ? |
| Dataflow | ? |
### Options
| Option | Description |
| ------------------------------- | --------------------------------------------------------------------------------------------------------- |
| Transform name | Name of the transform.
Note: This name has to be unique in a single pipeline.
|
| Considered empty string as null | The transform can consider empty string as null. |
### Fields
Pick a list of fields to evaluate and specify a field name and type for the field output.
| Option | Description |
| ------------ | ----------------------------------------------------------------------------------------------------- |
| Name | The result field name, can overwrite an existing one. |
| Type | The formats to convert the value into the chosen data type. |
| Remove | Remove input fields from the stream. |
| Input fields | The order of the input fields listed in the columns determines the order in which they are evaluated. |
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