Upgrade PostgreSQL 9.X to 12.X in Windows
Learn how you can upgrade a PostgreSQL server and ensure your databases follow to the new version.
2021-02-09
42,179 reads
PostgreSQL
Introduction to PostgreSQL Database on Amazon RDS
This article explains how to get started with PostgreSQL on AWS.
2020-12-15
1,737 reads
Rules in PostgreSQL
We sometimes need to perform a different/alternative actions during database queries. We need it for data protection or data abstraction. The PostgreSQL rule system allows to define an alternative action on insert, update or delete. A rule generates an extra query. As a result, rule execution impacts the performance of the system. Creating Rules A […]
2020-12-03
9,063 reads
Getting started with PostgreSQL on MacOS
This article covers how to install PostgreSQL on the macOS.
2020-11-19
3,724 reads
Experimenting with PostgreSQL in a Container
Learn how to get started using a container to run PostgreSQL, or really any other RDBMS, including a gotcha to watch out for.
2020-10-06
3,631 reads
A Getting Started PostgreSQL Tutorial
Introduction to PostgreSQL PostgreSQL is a free and general purpose open source object-relational database system that uses and extends the SQL language. Though originally designed to run on UNIX platforms, PostgreSQL is eligible to run on various platforms such as Linux, macOS, Solaris, and Windows. PostgreSQL databases provide enterprise-class database solutions and are used by […]
2020-09-28
6,663 reads
Installing PostgreSQL 11 on Windows with Step-by-step Instructions
PostgreSQL is a free database management system (DBMS). PostgreSQL 11 is the new version of this DBMS. We will take a look at how to install PostgreSQL 11 on Windows. This article covers where to download PostgreSQL 11, how the installation process looks like, and how to connect to the PostgreSQL server. Step-by-Step Installation on Windows […]
2020-09-03
21,240 reads
Postgresql JDBC Tutorial on Linux
PosgtreSQL is a free and general purpose open source object-relational database system that uses and extends the SQL language. Though originally designed to run on UNIX platforms, Postgres is able to run on various platforms, such as macOS, Solaris, Windows, Unix, and Linux. PostgreSQL databases provide enterprise-class database solutions and are used by a wide […]
2020-05-11
9,805 reads
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Can someone please explain what happens?
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SELECT COUNT(DISTINCT) returns null when nothing is found instead of 0
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Question of the Day
Creating JSON III
In a SQL Server 2025 table, called Beer, I have this data:
BeerIDBeerName 1Becks 2Fat Tire 3Mac n Jacks 4Alaskan Amber 8KirinI run this code:
SELECT JSON_OBJECTAGG(
BeerID: BeerName )
FROM beer;
What are the results? See possible answers