Category: SQL & Databases

60 questions in SQL & Databases.

What is connection pooling and why is it important

March 22, 2026 · SQL & Databases

Understand how connection pooling reduces latency and resource exhaustion in database-driven applications.

March 19, 2026 · SQL & Databases

Store and query flexible schema-less data using the native JSON data type in MySQL 5.7 and later.

March 17, 2026 · SQL & Databases

Compare SQL and NoSQL databases across schema, scalability, consistency, and use cases.

March 15, 2026 · SQL & Databases

Apply indexing, query rewriting, and server tuning to speed up slow MySQL queries.

March 14, 2026 · SQL & Databases

Store, query, and index JSON and JSONB data in PostgreSQL for flexible schemas.

March 12, 2026 · SQL & Databases

Understand MySQL replication architectures for high availability, scaling reads, and disaster recovery.

March 09, 2026 · SQL & Databases

Set up and optimize full-text indexes in MySQL for efficient natural language searching.

March 08, 2026 · SQL & Databases

Compare MySQL storage engines like InnoDB and MyISAM and learn how to choose the right one for your workload.

March 05, 2026 · SQL & Databases

Populate databases with initial or test data using seed scripts and fixtures for development and testing.

March 01, 2026 · SQL & Databases

Preserve deleted rows for audit and recovery by implementing soft deletes with a flag or timestamp column.