# SQLInput

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/chains/sql_database/query/SQLInput)

Input for a SQL Chain.

## Signature

```python
SQLInput()
```

## Extends

- `TypedDict`

## Constructors

```python
__init__(
    question: str,
)
```

| Name | Type |
|------|------|
| `question` | `str` |


## Properties

- `question`

---

[View source on GitHub](https://github.com/langchain-ai/langchain/blob/02991cb4cf2063d51a07268edafb05fe53de1826/libs/langchain/langchain_classic/chains/sql_database/query.py#L20)