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Tag: foreign key

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PostgreSQL: Foreign keys and insertion order in SQL

by Hans-Jürgen Schönig | 10.2020
Foreign keys will introduce some issues which have to be considered when writing applications. If a foreign key is in place the inseration order starts to matter.

1-to-1 relationship in PostgreSQL for real

by Pavlo Golub | 05.2019
How to implement 1-to-1 relationship in PostgreSQL? Tricks with UNIQUE constraints? Check how to achive that using DEFERRABLE foreign keys.

Foreign Key Indexing and Performance in PostgreSQL

by Laurenz Albe | 10.2018
Foreign key constraints are an important tool to keep your database consistent while also documenting relationships between tables. A fact […]

PostgreSQL: Indexes and foreign keys

by Hans-Jürgen Schönig | 07.2017
Missing indexes and foreign keys may cause database performance problems. Learn how to speed up things dramatically - not only in PostgreSQL!
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