#Indexing

Explain how database indexes work internally. Discuss B-Trees, B+ Trees, clustered vs non-clustered indexing, and index lookup performance.

How does database indexing work internally, and which data structure is commonly used?

Which columns would you give indexes to in a database, and why?

What is indexing in databases? Explain how it improves query performance and what happens internally to achieve this efficiency.

Explain database concepts, specifically focusing on indexing and cardinality. Why are they important?