PostgreSQL

SQLServerCentral Article

A Getting Started PostgreSQL Tutorial

  • Article

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 […]

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2020-09-28

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SQLServerCentral Article

Installing PostgreSQL 11 on Windows with Step-by-step Instructions

  • Article

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 […]

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2020-09-03

21,885 reads

JDBC-Connection

Postgresql JDBC Tutorial on Linux

  • Article

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 […]

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2020-05-11

9,857 reads

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Question of the Day

ORDER BY alias

There is a table tmp_tab:

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression:
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers