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Home/Questions/Spark/Big Data/Sqoop Incremental Import?

Sqoop Incremental Import?

Spark/Big Dataeasy0.6 min readPremium
Frequency
Low
Asked at 1 company
Category
452
questions in Spark/Big Data
Difficulty Split
88E|81M|283H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Altimetrik
Key Concepts Tested
sql
Expert AnswerPremium
129 wordsIncludes code examplesInterview-ready
**Why Incremental**: Full table scans on 100M+ row RDBMS tables cause locks, replication lag, and hour-long loads. Incremental captures only delta—minutes instead of hours. **Modes**: (1) **append**—check column (e.g., id) for new rows; append-only tables. (2) **lastmodified**—timestamp column; captures updates and inserts; use `--merge-key` to upsert. **Architectural Logic**: Store `--last-value` in a control table or file; next run reads it....
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