# ALTER clause

The `ALTER` clause is used to change existing definitions of [enums](https://memgraph.com/docs/fundamentals/data-types#enum).

# 1. Altering an enums

## 1.1 Adding an extra value

Use the following query to add a single value to an existing enum.

```cypher
ALTER ENUM Suit ADD VALUE Joker;
```

## 1.2 Updating a value

Use the following query to change representation of an existing value in an existing enum.

```cypher
ALTER ENUM Suit UPDATE VALUE Joker TO Wild;
```