Data Engineering
Joins, anti-joins, reshaping and reusable Python utilities for pipelines.
start timed mock interview- 1Join orders to customerssql · JOINeasy
- 2Customers with no ordersMeta-style churn / anti-joinmedium
- 3Group by key functionPipeline-style grouping utilitymedium
- 4Batch an iterableNetflix-style batching generatorhard
- 5Merge two DataFramesPipeline-style join of two sourcesmedium
- 6Reshape wide to longWarehouse-style wide-to-long reshapehard