How was my experience ?

My experience was was amazing! Actually in their swag referral program I was entitled for the Level - 1 Swag but after few days of hacktoberfest, I got an email from QuestDB community manager, stating due to some problems with manufacturer they will be sending me a T-shirt withinh the DEC 2021!!!! XD .

I got my swag in the month of Nov 2021 only, but I didn't had the time to write a blog about this

What is QuestDB

QuestDB is the fastest open source time series database

and ofc they are amazing, even for my college projects we now use the Quest DB! Yup its that amazing!
You could know more about them from these links:

My Quest DB Swag

questdb / questdb

An open source time-series database for fast ingest and SQL queries

QuestDB

QuestDB is an open-source time-series database for high throughput ingestion and fast SQL queries with operational simplicity. It supports schema-agnostic ingestion using the InfluxDB line protocol, PostgreSQL wire protocol, and a REST API for bulk imports and exports.

QuestDB is well suited for financial market data, application metrics, sensor data, real-time analytics, dashboards, and infrastructure monitoring.

QuestDB implements ANSI SQL with native time-series SQL extensions. These SQL extensions make it simple to correlate data from multiple sources using relational and time-series joins. We achieve high performance by adopting a column-oriented storage model, parallelized vector execution, SIMD instructions and low-latency techniques. The entire codebase is built from the ground up in Java and C++, with no dependencies and zero garbage collection.