5 Points to Check First When SQL Is Slow: How to Improve Execution Plans, Indexes, and JOINs

When you execute an SQL query, the results do not return quickly.You may have had no issues during development, but the ...
techtarget

Using a LEFT OUTER JOIN vs. RIGHT OUTER JOIN in SQL

In this excerpt from SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL, John L. Viescas and Michael J. Hernandez discuss the LEFT OUTER JOIN vs. the RIGHT OUTER JOIN and offer ...
InfoWorld

SQL tutorial: Learn SQL on PostgreSQL

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 ...