First things first, if your database has IP address / networking security, you’ll need to whitelist our IP address: 
146.148.83.61
34.42.34.129
Follow the links below on how to connect your database:

Snowflake

Postgres

Redshift

Bigquery

S3

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Set up the Integration

In the left sidebar, click on Settings Integrations.
Image 1 Pn

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Selecting a Primary Data Source

After adding a database integration you can also set it to be your team’s default data source.