Knowing which version of MySQL you are running is vital when making sure your code is compatible and that you are using supported features. Here’s how to find out which you are running. For example, older versions of MySQL lack features for handling JSON data and… Read More »How To Check your MySQL (Or MariaDB) Version [Easy]
MySQL SELECT queries are commands that pull data from your database tables according to conditions each record must meet. Complex queries will often need to combine the results from two or more SELECT queries – this is what the UNION operator does. UNION Syntax SELECT… Read More »Using the ‘UNION’ Operator in MySQL and MariaDB
In this guide, we cover foreign key constraints in MySQL and MariaDB, along with a number of useful examples. MySQL (and its fork MariaDB) are Relational Database Management Systems (RDBMS) – Database Systems which hold data in tables which can be related to each other. Tables in… Read More »Guide to Foreign Key Constraints in MySQL and MariaDB [With Examples]
This guide explains how to list databases and tables using MySQL or MariaDB using simple commands. Managing your databases from the Linux shell is quick and efficient compared to some of the bloated database management tools available. Here’s a quick primer on seeing what databases… Read More »Listing Databases and Tables in MySQL and MariaDB
PostgreSQL is one of the best database engines for an average web project and many who moves to psql from MySQL (for example) often ask the following questions: What is the analog of “show tables” in Postgres? How can I get the list of databases… Read More »Postgresql: show tables, show databases, show columns, describe table
PostgreSQL (or simply Postgres) is powerful and extremely popular database management system. It comes with easy to use tool that makes it possible to export output of any query into text file. If you are familiar with Mysql you may know about SELECT … INTO… Read More »PostgreSQL to File