# @dataengineeringtamil on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DVqkOvSkrOs
- **Gondola URL:** https://gondola.cc/posts/63365734-dataengineeringtamil-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/86c1172aca.jpg
- **Posted:** 2026-03-09T13:18:40.000+00:00
- **Account Owner:** Data Engineering Tamil (@dataengineeringtamil) — https://gondola.cc/dataengineeringtamil

## Caption

Most Data Engineers learn PySpark before SQL.
Airflow before Linux.
Cloud before Python.

Then wonder why they struggle.

Don't build the roof before the foundation.

Master these 3 first 👇

1️⃣ Linux
File system • Permissions • SSH
grep • find • Bash scripting
Cron jobs • Log analysis • Process monitoring

2️⃣ SQL
JOINs • CTEs • Window functions
Subqueries • Aggregations • Indexes
Partitioning • Query optimization

3️⃣ Python
Lists • Dicts • Loops • Functions
File handling • Exception handling
APIs • Pandas • Virtual environments

Then pick up 👇

Spark → DBT → Airflow → NoSQL → Cloud → Data Warehouses

In 12 years, every strong engineer I met had these 3 locked down first.

Don't skip the basics.
They show up eventually — in your growth or in your gaps.

Follow for more dataengineeringtamil

#DataEngineering #DataEngineer #SQL #Python #Linux PySpark Airflow DBT

## Stats

- **Views:** 0
- **Likes:** 1,413
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- **Comments:** 6

## Tags

linux, dataengineer, dataengineering, sql, python

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