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Write a Python script to process raw JSON files containing sales data and load them into a relational database.

Python/Codingeasy0.3 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Python/Coding
Difficulty Split
127E|24M|28H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Adidas
Key Concepts Tested
pythonsql
Expert AnswerPremium
68 wordsInterview-ready
**Flow:** Read JSON → pd.json_normalize (flatten nested) → DataFrame → to_sql. For multiple files: concat then load. Use chunksize if large. **Schema:** json_normalize with record_path, meta for nested. Validate required keys. Handle missing: fillna or reject. **Production:** Transaction per file (all-or-nothing). Bulk insert (to_sql with method='multi'). Idempotency: upsert by (date, id) or truncate+load....
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