Tiempo de lectura: 2 minutos In SQL, joins are used to combine rows from two or more tables based on a related condition between them. I will show you how to use the most important joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN, with NULL checks to handle unmatched rows. 1. INNER JOIN INNER JOIN returns only the … Read more
Tiempo de lectura: 2 minutos In SQL, joins are used to combine rows from two or more tables based on a related condition between them. There are several types of joins, but the most important ones are: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN. Next, I’ll show you how to use each one with examples. 1. INNER JOIN … Read more
Tiempo de lectura: 2 minutos Today we are going to learn how we can recover a database for which we don’t have a .sql backup copy, but we do have access to its mysql folder or directory. This can happen when the operating system doesn’t boot up, but we still have access to the hard drive. The first thing we … Read more
