Here is the roadmap that I followed:
𝗦𝘁𝗲𝗽 𝟭: 𝗦𝗤𝗟
- Basic SQL Syntax
- DDL, DML, DCL
- Joins & Subqueires
- Views & Indexes
- CTEs & Window Functions
𝗦𝘁𝗲𝗽 𝟮: 𝗣𝘆𝘁𝗵𝗼𝗻
- Fundamentals
- Numpy
- Pandas
𝗦𝘁𝗲𝗽 𝟯: 𝗣𝘆𝘀𝗽𝗮𝗿𝗸
- RDD
- Dataframe
- Datasets
- Spark Streaming
- Optimization techniques
𝗦𝘁𝗲𝗽 𝟰: 𝗗𝗮𝘁𝗮 𝗪𝗮𝗿𝗲𝗵𝗼𝘀𝘂𝗶𝗻𝗴/𝗗𝗮𝘁𝗮 𝗠𝗼𝗱𝗲𝗹𝗶𝗻𝗴
- OLAP vs OLTP
- Star & Snowflake Schema
- Fact & Dimension Tables
- Slowly Changing Dimensions (SCD)
𝗦𝘁𝗲𝗽 𝟱: 𝗖𝗹𝗼𝘂𝗱 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀
- Nosql DB
- Relational DB
- Datawarehousing
- Scheduling & Orchestration
- Messaging
- ETL Services
- Storage Services
- Data Processing Service