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Category: How To

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Triggers to enforce constraints in PostgreSQL

by Laurenz Albe | 04.2019
  Sometimes you want to enforce a condition on a table that cannot be implemented by a constraint. In such […]

DECLARE CURSOR in PostgreSQL or how to reduce memory consumption

by Hans-Jürgen Schönig | 04.2019
This blogpost is about using cursors in PostgreSQL, their purpose and limitations and what DECLARE CURSOR and FETCH have to do with it.

Security and PostgreSQL - a reminder on various attack surfaces

by CYBERTEC Guest | 04.2019
This article gives an overview about common security problems as well as ways to mitigate these risks in PostgreSQL.

PostgreSQL count(*) made fast

by Laurenz Albe | 04.2019
  It is a frequent complaint that count(*) is so slow on PostgreSQL. In this article I want to explore […]

unaccent: Getting rid of umlauts, accents and special characters

by Hans-Jürgen Schönig | 03.2019
Unaccent is a useful PostgreSQL extension for improving user experience. Get insight into this extension and its purpose.

Choose plpgsql variable names wisely

by Pavlo Golub | 03.2019
Pavel Stehule recently wrote the post "Don't use SQL keywords as PLpgSQL variable names" describing the situation when internal stored […]

"Exclusive backup" method is deprecated - what now?

by Laurenz Albe | 02.2019
  UPDATE 12.07.2022: The “exclusive backup” method of calling pg_start_backup('label') before backup and pg_stop_backup() afterwards has been removed in PostgreSQL […]

Looking at MySQL 8 with PostgreSQL goggles on

by CYBERTEC Guest | 02.2019
Compare MySQL 8 and PostgreSQL for available features, general querying experience and documentation clarity.

Implementing “AS OF”-queries in PostgreSQL

by Hans-Jürgen Schönig | 02.2019
Many databases such as Oracle provide "AS OF" queries (timetravel). This blog explains how to do time travel in PostgreSQL.

pg_permissions: Inspecting your PostgreSQL security system

by Hans-Jürgen Schönig | 01.2019
pg_permissions is a tool display the security settings of your database. Get a quick overview of what's going on inside your security.
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