About this document

PostgreSQL Constraints Overview by DjAto Xd is a document available to read on EtoBox.

1) The document discusses various database constraints including check constraints, not null constraints, unique constraints, primary keys, and foreign keys. It provides examples of creating tables with these different constraints. 2) It then explains the differences between truncate, delete, and drop commands in terms of purpose, usage, commit requirements, undo capabilities, selective deletion, triggers fired, and more. 3) The last question asks the reader to consider an employee database with three t

Author

DjAto Xd

Language

EN