SQL course

If you are looking to learn sql concatie concatenate sql results or columns, texts, or values ​​in general to get a string from the array, you are looking for the…

Forward! With this tutorial I want you to learn clearly and directly the SQL JOIN clause. Since there is not a single way to do a JOIN And since I…

If you are here, you are surely looking to remember the syntax of the SQL Update statement or to see quick and practical examples that will help you with your…

SQL allows the structure of a table to be altered in any way a developer needs. For all these queries we use the ALTER statement. Alter SQL can basically be…

Content SQL DROP TABLE Syntax Use cases sample querySQL DROP TABLE The DROP TABLE command in SQL allows you to permanently drop a table from a database. This removes at…

Content SQL definition What is SQL used for? The advantages of SQL Disadvantages The main SQL statementsSQL definition Let's get very academic for once and start with the definition of…

In this article I want to help you and anyone who has doubts about how subqueries work with various simple and very graphic examples that clear up doubts. Content Example…

If you are working with date type columns you need to know the DATE_SUB function. Do you know her? Yeah? Here I leave you a bit of everything, this is…

Looking for examples of CURDATE? If you have doubts about how to use the CURDATE function in MySQL or you want an example of copy and paste this post is…

javier gomez Welcome to srcodigofuente.com! In this tutorial I will teach you everything you need to know about the SQL NOW function. This function is very useful for working with…