Discuss the challenges of query optimization in columnar databases.

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what is columnar database Informational

• Explain different partitioning strategies based on time, range, or hash of column values.
• Compare the offerings of different cloud providers for columnar database solutions (e.g., AWS Redshift, Google BigQuery, Azure Synapse Analytics).
• Are there any certifications available for columnar database technologies?
• How do columnar databases ensure data durability in a distributed environment?
• Explain the techniques used to query and analyze nested data structures in columnar databases.
• Explain the trade-offs between compression ratio and decompression speed for various algorithms.
• What are some best practices for schema design when dealing with semi-structured data in a columnar database?
• How can query performance issues be diagnosed and resolved in columnar databases?
• Discuss the auditing capabilities of columnar database systems.
• What are the best practices for designing schemas for columnar databases?