



Explain the difference in I/O behavior between columnar and row-oriented databases for analytical queries.
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what is columnar database Informational
- Discuss the use of techniques like optimistic and pessimistic concurrency control in columnar databases. How do columnar databases handle schema evolution and changes over time?
- Explain the role of data catalogs in managing data stored in columnar databases.
- What are the best practices for performing a database migration with minimal downtime and data loss?
- What are the advantages and disadvantages of different encoding techniques?
- How does selecting only necessary columns improve query performance?
- How does columnar storage affect data visualization?
- What are the trade-offs between consistency and availability in distributed columnar databases?
- Discuss the tools available for performance analysis and troubleshooting in columnar databases.
- How does data partitioning work in a columnar database?
- How do columnar databases handle updates to historical data?
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