Mysql functions

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  • Khái niệm hàm người dung (user define function): - Hầu hết các ngôn ngữ lập trình, hay cơ sở dữ liệu lớn, luôn luôn có một phần mở rộng cho phép người dùng tự định nghĩa một số quy tắc, hàm hoặc thủ tục. - User define function giống như stored procedure của SQL server. Hàm người dùng cũng có thể truyền tham số nhưng không được mang thuộc tính OUTPUT. Thay vào đó chúng ta dùng câu lệnh RETURN.

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  • FIFTH EDITION Pantone: CMYK: Back in 2001, when I wrote the first edition of this book (it was called Build Your Own Database Driven Web Site with PHP & MySQL back then), readers were astonished to discover that you could create a site full of web pages without having to write a separate HTML file for each page. PHP stood out from the crowd of programming languages, mainly because it was easy enough for almost anyone to learn and free to download and install.

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  • MySQL Cheat Sheet The MySQL cheat sheet is designed to act as a reminder and reference sheet, listing useful information about MySQL. It includes a list of the available functions in MySQL, as well as data types. It also includes a list of MySQL functions available in PHP,

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  • Although there is a MySQL package-installer for Leopard (available here), there are a few reasons why you might still want to compile your own version of MySQL:Although there is a MySQL package-installer for Leopard (available here), there are a few reasons why you might still want to compile your own version of MySQL:

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  • MySQL Administrator's Bible-P2: With special focus on the release of the next major of MySQL, this resource provides a solid framework for anyone new to MySQL or from a background database,as well as experience MySQL administrators. The high-profile author duo provides essential coverage of the fundamentals of the coverage database management, including unique approach features MySQL database engine and functions-as well as MySQL SQL queries, data and index types, stores procedure and functions, triggers and views, and transactions.

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  • Chắc có lẽ cũng nhiều bạn muốn biết cách để làm một forum nhiều children forum hay cây thư mục đa cấp nên minh viết một bài về đệ qui category sử dụng php & mysql cho các bạn tham khảo. Cách viết cũng rất đơn giản thôi: sử dụng một function gọi lại chính nó.

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  • Welcome to Beginning PHP6, Apache, MySQL Web Development , your new trusty resource for assistance in creating your own dynamic web sites. There are a lot of technologies available that can be used to deliver great web sites, and we ’ re glad you chose the Apache/MySQL/PHP (sometimes referred to simply as AMP) approach. You may or may not have had a taste of these three components in the past, but either way we ’ re confident that you will be impressed with the power that lies within them. With this guide by your side, you ’ ll soon learn why this combination is rapidly...

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  • In the decade since MySQL burst on the scene, it has become the dominant open source database, with capabilities and performance rivaling those of commercial RDBMS offerings like Oracle and SQL Server. Along with Linux and PHP, MySQL is at the heart of millions of applications. And now, with support for stored procedures, functions, and triggers in MySQL 5.0, MySQL offers the programming power needed for true enterprise use.

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  • This comprehensive tutorial and reference covers all the basics of PHP 5, a popular open source Web scripting language, and MySQL 4.

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  • Expert MySQL is the leading reference for learning, understanding, and extending the MySQL server. It unlocks the full promise of open source by showing how to modify the code, create your own storage engine, build your own authentication plugins, and even add your own functions and commands to the SQL language. No other book provides the level of detail or the extensive examples of the inner workings of MySQL that have taken engineers years to master. Expert MySQL is a must have book for all systems integrators, engineers, and software developers working with the MySQL server code....

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  • Best practices and expert techniques for today's most demanding apps As the world's most popular, general purpose, open source scripting language, PHP is frequently used with MySQL to create high-traffic, mission-critical applications. This indispensable book shares proven, author-tested best practices and expert techniques that can be applied to even the most demanding MySQL-driven PHP apps.

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  • Offering a step-by-step walk through understanding the three key open source technologies that form the basis for most active web servers, this book demonstrates how to quickly create a professional-looking, functional site using Apache Web server, the MySQL database system, and the PHP scripting language. You’ll take an in-depth look at why the combination of PHP, MySQL, and Apache has become so popular: flawless interaction, flexibility, customization, and cost, as well as their ability to run on both Linux and Windows servers....

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  • Hỗ trợ người dùng xử lý, thao tác trên các dữ liệu được trả về. .Các nhóm hàm Có 4 nhóm hàm cơ bản thao tác dựa trên các kiểu dữ liệu Kiểu ngày (Date Functions) Kiểu chuỗi (String Functions) Kiểu số (Numeric Functions)Các hàm thống kê (Summarising Function)Ngoài ra còn có các hàm về điều khiển hỗ trợ người dùng thiết lập cấu trúc điều khiển trả về dữ liệu.

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  • This update to a Wrox bestseller dives in and guides the reader through the entire process of creating dynamic, data-driven sites using the open source “AMP” model: Apache Web server, the MySQL database system, and the PHP scripting language. The team of expert authors covers PHP scripting, database management, security, integration, and e-commerce functions and comes complete with a useful syntax reference.

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  • Here I have also used an invaluable function called print_r. It asks PHP to display information about a variable in human readable form. The _r stands for “in human readable format.” In the case of the new object $object, it prints the following: User Object ( [name] = [password] = ) However, a browser compresses all the whitespace, so the output in a browser is slightly harder to read: User Object ( [name] = [password] = ) In any case, the output says that $object is a user-defined object that has the properties name and password.

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  • Figure 5-1. The output of PHP’s built-in phpinfo function As you can see, the strrev function reversed the order of characters in the string, str_repeat repeated the string “Hip ” twice (as required by a second argument), and strtoupper converted “hooray!” to uppercase. Defining a Function The general syntax for a function is: function function_name([parameter [, ...]]) { // Statements } I’ll explain all the square brackets, in case you find them confusing. The first line of the syntax indicates that: • A definition starts with the word function.

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  • MySQL is the most popular open source database system available. Although it’s free, it’s still very dependable and fast, and is being employed increasingly in areas that used to be the province of Oracle or MS SQL Server. Thanks to a variety of utilities packaged with MySQL, administration is fairly effortless. With its several application programming interfaces (APIs), it’s easy to develop your own software to interface with MySQL. This book provides a quick reference to MySQL statements and functions, the administrative utilities, and the most popular APIs.

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  • With PHP for the World Wide Web, Fourth Edition: Visual QuickStart Guide, readers can start from the beginning to get a tour of the programming language, or look up specific tasks to learn just what they need to know. This task-based visual reference guide uses step-by-step instructions and plenty of screenshots to teach beginning and intermediate users this popular open-source scripting language. Leading technology author Larry Ullman guides readers through the latest developments including use and awareness of HTML5 with PHP.

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  • In Oracle8 we saw the addition of bitmap indexes, function-based indexes, as well as reverse key indexes and star index structures. We also saw the Oracle SQL optimizer becoming more intelligent about the way indexes are used by SQL statements. In Oracle9i, we have the index skip scan, the and_equal hint to combine individual indexes into a contaminated index, as well as specialized bitmap access methods to improve the speed of data warehouse queries.

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  • Oracle RMAN 11g Backup and Recovery- P1: Oracle, yet another edition of our RMAN backup and recovery book has hit the shelves! Oracle Database 11g has proven to be quite the release to be sure. RMAN has new functionality and whizbang new features that improve an already awesome product. RMAN has certainly evolved over the years, as anyone who started working with it in Oracle version 8 can attest to.

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