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Introduction to PostgreSQL
- PostgreSQL is an advanced open-source RDBMS supporting SQL and JSON querying, with origins dating back to 1986 at UC Berkeley.
- Key features include ACID compliance, MVCC, and extensibility, making it suitable for various workloads.
- Installation requirements for PostgreSQL include modest hardware specifications and platform-specific installation methods.
- Configuration involves editing files like postgresql.conf and using the psql command-line tool for database management and administration.
- PostgreSQL's architecture follows a client-server model, with key processes like WAL writer and background writer for data management.
- Core concepts cover databases, schemas, tables, data types, constraints, indexes, and views within PostgreSQL.
- SQL operations like CRUD, joins, subqueries, aggregations, and transactions are fundamental to working with PostgreSQL.
- Advanced features include window functions, CTEs, JSONB support, full-text search, and query optimization techniques.
- Security measures like roles, permissions, SSL encryption, and row-level security enhance data protection in PostgreSQL.
- Deployment best practices, scaling strategies, maintenance procedures, and the PostgreSQL ecosystem are crucial for production use.
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