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Category: How To

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Here you can find all blog posts about the Category: How To. You can go back to all blog posts or take a look into our other categories & tags.

JSON in PostgreSQL: how to use it right

by Laurenz Albe | 09.2021
  The comprehensive JSON support in PostgreSQL is one of its best-loved features. Many people – particularly those with a […]

Building an Oracle to PostgreSQL migrator: Lessons learned

by Hans-Jürgen Schönig | 09.2021
Oracle to PostgreSQL migration - Lessons learned in building a migration tool. How to avoid errors, null bytes and broken content.

PostGIS upgrade with Ubuntu 20.04.02

by Florian Nadler | 09.2021
Last time, we installed PostGIS on top of PostgreSQL. Today, I will show you how to upgrade PostGIS on Ubuntu 20.04.02.

Fixing out-of-sync sequences in PostgreSQL

by Hans-Jürgen Schönig | 08.2021
This post shows how to deal with out of sync PostgreSQL sequences in underlying tables using open-source pg_sequence_fixer extension

PostgreSQL grouping sets: ROLLUP & CUBE

by Hans-Jürgen Schönig | 08.2021
PostgreSQL offers many OLAP-style workload features. One of those features is called “GROUPING SETS”. Let's deep dive into ROLLUP & CUBE:

PostgreSQL Security: 12 rules for database hardening

by Hans-Jürgen Schönig | 07.2021
UPDATED August 2023: PostgreSQL security - make your database safe. Follow these 12 recommendations for proactive database hardening.

PostgreSQL: LIMIT vs FETCH FIRST ROWS ... WITH TIES

by Hans-Jürgen Schönig | 07.2021
The LIMIT/OFFSET clause is off standard and thus not portable. Read about the proper way to handle it by using “SELECT … FETCH FIRST ROWS”.

Understanding LATERAL joins in PostgreSQL

by Hans-Jürgen Schönig | 07.2021
LATERAL joins are extremely useful & can be utilized in many cases to speed up operations, or to simply make code a lot easier to understand.

Simulating temporal tables with dblink and replication delay

by CYBERTEC Guest | 07.2021
How to simulate unsupported out of the box temporal tables in PostgreSQL using delayed streaming replication and dblink extension

PostGIS setup with Ubuntu 20.04.2

by Florian Nadler | 06.2021
This post shows how to implement PostGIS setup on Ubuntu 20.04, how to install PostGIS packages & how to install extensions into database
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