In this lesson, we'll cover how to write SQL queries to retrieve and add specific data to SQL database tables. The term "query" refers to any SQL statement that retrieves data from your database. In ...

These books cover everything from beginner SQL queries to advanced database architecture. Perfect for developers, data analysts, and backend engineers. Learn performance tuning, indexing, ...

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 ...

The max_connections defines the maximum number of concurrent connections to the PostgreSQL DB Server. Try to set the max_connections to the maximum number of connections expected at peak load. However ...

If you work with data but find programs like Excel too limiting, learning SQL may be the next step on your data journey. This tutorial will show you the basics of SQL, a tool used by programmers, ...