![]() ![]() ![]() To connect with psql if your database uses the defaults and is on the computer you are using, make sure your database is running, and type psql at the command line: Martins-iMac:~ mheller$ psql psql (10.5) Type "help" for help. Later on, when you're trying to construct queries with complicated joins, you might want to use a graphical client, primarily to save yourself a lot of time and error-prone typing. For most purposes, the psql command line works just fine at the beginning. The information above is independent of the client you use. The port will be 5432 unless it was changed, typically at database startup. By default, there will be two visible databases, one named postgres and one using your user name. If you install Postgres on the same computer as the client, the host will be localhost. Several of these have well-known default values. The key things to know to connect to your Postgres database are its host, its assigned port, the database that you’d like to use initially, and your username and password. If I were doing this exercise on Windows, I might well use the visual SQL query builder and SQL command line in Alpha Anywhere. Since I have an active JetBrains subscription, I also installed DataGrip, a multi-database client tool. The free trial has limits, but it is usable and does not expire. Postico is a commercial Postgres client product for MacOS. The transactions being monitored in the postgres database are for maintenance purposes. PgAdmin 4 displays its UI in a web browser. It’s useful to add the command-line utilities for Postgres to your path. ![]() In addition to installing the latest production database version (10.5) with default configuration settings, I added the Postgres command-line utilities to my computer's path and installed both the cross-platform pgAdmin 4 and the Mac-only Postico GUI tools, as shown below. My InfoWorld colleague Serdar Yegulalp wrote a strong tutorial on installing and configuring PostgreSQL, “ Get started with PostgreSQL 10.” I used that to inform my installation on an iMac, and wound up downloading and running the Mac-only Postgres.App shown in the screenshot below. Finally, I’ll leave you with a few good references to help you take your next steps with Postgres and SQL. Along the way, I will suggest some GUI clients for Postgres you might want to use, and provide a brief overview of useful PostgreSQL extensions. To cap it all off, we’ll execute a query against two related tables by using SQL join clauses. In this tutorial, we will step through installing PostgreSQL, connecting to the database, loading some data, and running a variety of SQL queries. I can pronounce Postgres I never know whether to say Post-gres-Q-L or Post-gres-sequel. You can also find a hosted high-performance version of PostgreSQL in Amazon Aurora, and a wire-compatible distributed implementation in CockroachDB.įrom here on in, I will use the names PostgreSQL and Postgres (not all-caps) interchangeably, as is the general practice. You can install it on Linux (all recent distributions), Windows (Windows 2000 SP4 and later), FreeBSD, OpenBSD, NetBSD, MacOS, AIX, HP/UX, and Solaris. With more than 20 years of development and deployment behind it, PostgreSQL is a solid open-source database that rivals even commercial relational databases in many respects. Users can extend PostgreSQL with new data types, functions, operators, aggregate functions, index methods, and procedural languages. PostgreSQL is an open-source, object-relational (also called extended relational) database management system. Modern relational database features in PostgreSQL include complex queries, foreign keys, triggers, updatable views, transactional integrity, and multi-version concurrency control. ![]()
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