Learn the crucial differences between UNION and UNION ALL in SQL. Discover how UNION removes duplicates while UNION ALL preserves all rows, impacting performance and result size. Complete guide for SQL developers.
Learn the definitive guide to database table naming conventions. Discover why singular names are preferred academically, how to handle T-SQL bracket usage, and best practices for balancing theoretical correctness with code readability.
Learn why sharing primary keys between parent and child tables is considered best practice in one-to-one database relationships. Discover benefits like automatic enforcement, reduced complexity, and space efficiency.