# FAQs

### 1. Which data sources do Dataflake support? 

We are currenly supporting puopular Data Sources including: PostgreSQL, ClickHouse, BigQuery, MySQL, Microsoft SQL Server, Flat files

<figure><img src="/files/vU0KWORSx90LzGdGRGMA" alt=""><figcaption></figcaption></figure>

### 2. Does Dataflake store your data?&#x20;

Dataflake doesn’t store any of our your data. Dataflake will send the query to your database server, take the result and send directly to viewer.

However, in case you use cache, Dataflake will store the query result in Dataflake based on the cache time. This will help us display the dashboard faster for viewer, and reduce the load for your database server.

### **3. Which permissions database role/user need (Readonly database)?**

Dataflake sends the query directly to your database and no more than that, so the database user just needs the SELECT (Read) permission on tables used in the SQL. We always recommend giving enough permissions to your user to keep your database safer from cyber attacks

### 4. What makes Dataflake diffferent from other data visualization tools?&#x20;

Dataflake is designed for Data Analysts from Small and Medium-Sized Businesses (SMBs) and Startups who are obsessed to tell better data story easily with highly customizable data visualization, and sharing, embedding analytics on websites or applications quickly and securely.

Dataflake aim to bring our users with seamless experience with high security and low cost   so that you can empower your data visualizations without constraints.


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