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9 pages in this section.
A conceptual map of how PostgreSQL schemas and constraints work together to make data correctness a property of the database rather than a hope about application code.
Learn fundamental schema design principles, including surrogate versus natural keys, naming conventions for tables and foreign keys, and common constraints.
Understand primary and foreign keys in PostgreSQL. Learn referential integrity, ON DELETE actions, and common SQL patterns for robust schema design.
Learn how to use CHECK and UNIQUE constraints in PostgreSQL to enforce data rules. Explore practical patterns, working examples, and common gotchas.
Learn to use PostgreSQL generated and identity columns for automatic ID generation and computed values, improving data integrity and query performance.
Learn how PostgreSQL handles DDL transactions, ensuring atomicity for schema changes. Explore practical patterns, examples, and common pitfalls.
Learn best practices for SQL schema design, including declaring foreign key relationships, using CHECK constraints, and managing DDL with versioned migrations.
A single-page roundup of every highlight bullet from the 8 pages in the Schema Design section, grouped by source page so you can scan all 43 takeaways without opening each article individually.