PostgreSQL Date And Time Part 2
In the second part of this PostgreSQL date time series, we examine a number of commonly used functions for getting current dates and times and converting strings to dates and times.
2021-09-22
3,563 reads
PostgreSQL
Array and Custom Data Types in PostgreSQL
Introduction Just like every other database, PostgreSQL has its own set of basic datatypes, like Boolean, Varchar, Text, Date, Time, etc. We can easily store data like numbers, characters, date, time, etc. using these supported datatypes, but what if we need to store multiple data elements in a single column? Suppose we are storing the […]
2021-09-10
13,423 reads
PostgreSQL Date And Time Part 1
This article shows the basics of using the age, and current date/time functions in PostgreSQL.
2021-08-09
2,470 reads
Getting a Query Execution Plan in PostgreSQL
Introduction You often need to check the performance of a PostgreSQL query you just wrote to look for some way to improve performance. In order to do this, you need a report of the query execution, which is called the execution plan). The query execution plan gives you the entire summary of the query execution […]
2021-03-18
9,728 reads
PostgreSQL WHERE, ORDER BY, and GROUP BY Clauses
Overview A database clause is a conditional statement used to filter data from the database. There are various database clauses available in PostgreSQL, like Where, Order By, Group By, Having, Distinct, Limit, Fetch. In this first chapter of the tutorial we will cover Where, Order By, Group By clauses with suitable example. WHERE Clause The […]
2021-03-11
35,125 reads
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
42,320 reads
Introduction to PostgreSQL Database on Amazon RDS
This article explains how to get started with PostgreSQL on AWS.
2020-12-15
1,749 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
9,143 reads
Getting started with PostgreSQL on MacOS
This article covers how to install PostgreSQL on the macOS.
2020-11-19
3,755 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
3,671 reads
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BIT_COUNT() IV
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Question of the Day
BIT_COUNT() IV
In SQL Server 2025, I run this code:
select bit_count('A')
What is returned? See possible answers