File Parsing for Data Engineers: Mid-Level

Parquet is columnar. Now explain what that physically means.

Parquet is columnar. Now explain what that physically means.

Category

Python

Difficulty

intermediate

Duration

25 minutes

Challenges

0 hands-on challenges

Topics covered: Parquet: What Columnar Actually Means, CSV to Parquet Conversion with pyarrow, Reading Partitioned Parquet from S3 with pyarrow.dataset, Avro vs Parquet vs ORC: The Decision Matrix, Compression Codecs: The Trade-off Interviewers Expect

Lesson Sections

1. Parquet: What Columnar Actually Means

2. CSV to Parquet Conversion with pyarrow

3. Reading Partitioned Parquet from S3 with pyarrow.dataset

4. Avro vs Parquet vs ORC: The Decision Matrix

5. Compression Codecs: The Trade-off Interviewers Expect