how to useful

Date/Time Related queries1. Get the first day of the current monthRun this command to quickly return to the first day of the current month. You can replace "sysdate" with any date value to specify the date of the query.The code is as follows:Select

The following articles mainly describe five useful methods for MySQL query optimization. Anyone familiar with SQL statements knows that if you want to operate a task, SQL statements can be written in many ways, but the query performance varies with

Google maps are popular and useful in searching for stores or other interesting places we want to know. maps are specially integrated into their websites by some stores so that they can be easily located. Although it is not easy to integrate, Google

Skip-grant-tables: very useful mysql startup parameter bitsCN.com Skip-grant-tables: very useful mysql startup parameters This section describes a very useful mysql startup parameter -- skip-grant-tables. As the name impliesGrant-tables is not

In MySQL database operations, we often write some SQL statements to implement the functions we want. However, it seems difficult for beginners of MySQL databases. This article summarizes six useful SQL statements. Beginners can use the following

Welcome to the Linux community forum and interact with 2 million technicians. Below are nine useful PHP functions. Do you know you have used them? 1. Any number of function parameters you may know that PHP allows you to define a function with

This article recommended 7 are not often used, but practical, very powerful PHP built-in functions, with good, can save the small partners a lot of time. PHP has many built-in functions, most of which are widely used by programmers. But there are

Mobile app UI design is like Damocles Sword, on the one hand, a visual, interactive, well-experienced UI can enhance the application in the user's mind image and recognition. On the other hand, a poorly experienced UI design not only allows users to

Objective:In "Share 5 visual regular expression editing tools"(http://www.csdn.net/article/2014-11-27/2822843-tools?reload=1) and "proficient in regular expression 12 A useful resource

PHP several useful custom Function summary, PHP Custom Function Summary This paper summarizes several useful custom functions of PHP. Share to everyone for your reference, as follows: Recently looking at the code, found that the following are some

Sass is the extension of CSS , adding nested rules, variables, mixing functions and many more. It simplifies the cost of organizing and maintaining CSS code. Compass is an open-source CSS framework that makes it easier to use CSS3 and popular design

This article comes from: The program engineerAs a command-line seeker, you may find yourself repeating the same commands over and over again. If you always go to the same computer with SSH, if you always connect a series of commands, if you always

DirectoryIntroductionBrowser selectorMake IE6 support PNG transparentRemove the dotted line of a hyperlinkDefines the width of an element in a row.Center a fixed-width pageImage replacement technologyMinimum widthHide horizontal scroll barI.

10 useful PHP Regular expressions, useful PHP regular expressions A regular expression is an important element in the development of a program that provides a string that describes or matches text, such as a specific character, word, or calculation.

Today, when it comes to image processing, everyone will think of Photoshop, or even Photoshop.This exclusive term is widely used as a verb or adjective. I am also a guy who basically cannot leave Photoshop. Every image on this blog is basically

Uncommon but useful GCC command line options (2)GuideThe gcc compiler provides a list of almost countless command line options. Of course, no one has ever used or mastered all of its command line options, but there are some command line options that

Share some very useful Vim commands Specifically, I am a fan of Vim. So before some of you throw stones at me, I will first show you a series of "Little-known Vim commands ". I mean, some commands that you may not have encountered before may be

This article recommends eight useful CSS tools. For Web developers, a good CSS tool is like a magic lamp, which can make their boring work interesting. Some of these CSS tools are used to help you learn the CSS 3 attributes, and some are used to

Build Sublime Text 2 into a useful IDESpeaking of the editor, most people may recommend Vim and Emacs. I have used Vim, which is really powerful, but I am not very used to it. I have always recommended SUblime Text 2 as an editor, then I tried it

For developers, regular expressions are a useful feature that provides strings for finding, matching, replacing sentences, words, or other formats. This article mainly introduces 15 super-practical PHP regular expressions, the needs of friends can