# SQL glossary: Freelancer level

3 SQL terms at the Freelancer level, each with a short definition and a link to its full page.

Updated: September 27, 2026

[Study these as flash cards](https://www.ask-codey.com/decks/sql/freelancer)

- [Deferrable Constraint](https://www.ask-codey.com/glossary/deferrable-constraint): A constraint whose checking may be postponed until transaction completion.
- [Initially Deferred](https://www.ask-codey.com/glossary/initially-deferred): A constraint mode starting each transaction with checking postponed until commit.
- [Initially Immediate](https://www.ask-codey.com/glossary/initially-immediate): A constraint mode starting each transaction with checking performed after each statement.

- Previous level: [Journeyman](https://www.ask-codey.com/glossary/subjects/sql/journeyman)
- Next level: [Master](https://www.ask-codey.com/glossary/subjects/sql/master)

[Every SQL term, by level](https://www.ask-codey.com/glossary/subjects/sql)

Source: https://www.ask-codey.com/glossary/subjects/sql/freelancer