Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...

I’ve created this overview of basic SQL syntax for the interested developer and anyone who could benefit from a cheat sheet. I’ll focus on basic data manipulation queries and follow up with future ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

PostgreSQL CASE statements make it possible to add conditional logic directly into SQL queries, working similarly to IF ELSE statements in programming languages and spreadsheet tools. This tutorial us ...

One of the most common problems when running SQL Servers is slow queries. The help desk or database team usually hears that described as the application is slow or ...