mysql diff date

MySQL benchmark test (ii)--Method Purpose:The method is not as high as the higher the better. And should be good at subtraction. To Jane is a kind of wisdom, the first thing to do is to collect MySQL state data. Collected, regardless of the time

This is a Linux file system under development. MySQL databases on Linux can be processed as file systems. The development team hopes to get more suggestions. the following article translated from: in fact, this is not a file system in the general

In fact, this is not a file system in the general sense. it does not have disk space, but uses the MySQL daemon to store data. SQL tables and some functions can be implemented through the file system. 1. how to implement it? Let's take a look at the

#now (), gets the date format of the current timestamp [' y-m-d h:i:s '] #sysdate (). Gets the date format of the current timestamp [' y-m-d h:i:s ']select now () select Sysdate (); #curdate () Gets the date format for the current timestamp [' y-m-d

LAMP = Linux + Apache + Mysql + Php, lampapache I. Mainstream Internet web Services Static service: 1. apache --- the mainstream of Small and Medium-sized static web Services, the eldest brother in web Servers 2. nginx --- mainstream of large new

Linux environment: Debian 6 Stable Program Version selection: Nginx:tengine 1.2.4Taobao produced, based on Nginx and introduced a number of new features mysql:5.1.66The latest version of the 5.1 series. The reason for not 5.5 is that 5.5 started

This article "My MySQL Learning experience (15)" will explain the MySQL logThe logs in MySQL are divided into 4 categories, and using these log files, you can see what's happening inside MySQL.respectively is1, error log: Log the MySQL service start,

1. The year of Popular Science:①, not the whole hundred years can be divisible by 4 for a leap year. (such as 2004 years is a leap year, 2100 is not a leap year) ②, the whole century can be divisible by 400 is a leap year. (as 2000 is a leap year, 19

The essence of a backup is to save a copy of the dataset, but the original data is constantly changing, so the backup can only revert to the data before the data changes. What about the changes? So it's important to develop a good backup strategy.I.

Collect and sort out common mysql SQL skills, If you don't talk much about it, You can directly post code to everyone. 1. Number Auxiliary table // Create table test (id int unsigned not null primary key); delimiter // create procedure pnum (cnt int