Shulou(Shulou.com)05/31 Report--

This article is mainly about "what's the difference between @ and @ @ of MySQL". Interested friends might as well take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what's the difference between @ and @ @ of MySQL"!

The difference between @ and @ @ in MySQL

@ x is a user-defined variable (User variables are written as @ var_name)

@ x is a global or session variable (@ @ global @ @ session)

Reference: 6.1.4 Server System Variables

Select @ @ log_error

Mysql > SET @ t1room0, @ t2room0, @ t3room0

Mysql > SELECT @ t1vision = (@ t2rang1) + @ t3purl 4jcgi t1jue t2jingt3

At this point, I believe you have a deeper understanding of "what's the difference between @ and @ @ of MySQL". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.