> ## Documentation Index
> Fetch the complete documentation index at: https://mage-staging.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# BigQuery

<Frame>
  <img alt="" src="https://www.vectorlogo.zone/logos/google_bigquery/google_bigquery-ar21.svg" width="300px" />
</Frame>

## Add credentials

<Snippet file="google-auth.mdx" />

## Using SQL blocks

1. Create a new pipeline or open an existing pipeline.
2. Add a data loader, transformer, or data exporter block.
3. Select `SQL`.
4. Under the `Data provider` dropdown, select `BigQuery`.
5. Under the `Profile` dropdown, select `default` (or the profile you added
   credentials underneath).
6. Next to the `Database` label, enter the database name you want this block to
   save data to.
7. Next to the `Save to schema` label, enter the schema name you want this block
   to save data to.
8. Under the `Write policy` dropdown, select `Replace` or `Append` (please see
   [SQL blocks guide](/guides/blocks/sql-blocks)
   for more information on write policies).
9. Enter in this test query: `SELECT 1`.
10. Run the block.

## Using Python blocks

1. Create a new pipeline or open an existing pipeline.
2. Add a data loader, transformer, or data exporter block (the code snippet
   below is for a data loader).
3. Select `Generic (no template)`.
4. Enter this code snippet (note: change the `config_profile` from `default` if
   you have a different profile):

```python theme={null}
from mage_ai.settings.repo import get_repo_path
from mage_ai.io.bigquery import BigQuery
from mage_ai.io.config import ConfigFileLoader
from os import path
from pandas import DataFrame

if 'data_loader' not in globals():
    from mage_ai.data_preparation.decorators import data_loader


@data_loader
def load_data_from_big_query(**kwargs) -> DataFrame:
    query = 'SELECT 1'
    config_path = path.join(get_repo_path(), 'io_config.yaml')
    config_profile = 'default'

    return BigQuery.with_config(ConfigFileLoader(config_path, config_profile)).load(query)
```

5. Run the block.