Mysql Strlen

MySQL optimization is very important. The most common and most needed optimization is limit. 　　The limit of MySQL brings great convenience to paging, but when the amount of data is large, the performance of limit is reduced dramatically. The same is 10 data select * FROM Yanxue8_visit limit 10000,10 and select * from Yanxue8_visit limit 0,10 is not a quantitative level ...

In this lesson, we want to learn how to increase the intelligent processing capacity of the Web page. Basic functions Welcome to the third and final lesson of this tutorial. If you've learned the first and second lessons, you've mastered the basics of installing and programming MySQL and PHP. Here are some of the other functions of PHP that might be useful to you and make your development process simpler. 　　First, let's look at the document. You should know some basic concepts of the header file, right? The header file is an external file whose contents are included in the main program. ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnosis Taobao guest Cloud host Technology Hall I believe many people have studied the MySQL Chinese full-text indexing problem, At present, MySQL does not support Chinese full-text indexing, helpless ~ ~ ~ ~ to find more n on the php+mysql Chinese Full-text index articles are not a good, for the general rookie simply do not know how to use, PHP Chinese participle ...

PHP Tutorial Imports Excel into the MySQL Tutorial database tutorial, using Excelparser class Excelparser {private $_data=array (0, ");     Private $_excel_handle; Private $_excel=array ();

Current Dream Dedecms v5.7 has been officially released, but in the actual use of the environment often we need to do some specific function of the implementation, such as the letter search, and so on, let us say how the function is implemented, the main method is to extract the first letter of the publication resources, stored in the datasheet, and then indexed. Dedecms based on PHP and MySQL technology development, can be used at the same time in Windows, Linux, UNIX platform, the environment needs are as follows: 1, Windows Platform: ...

The function of this program is to read the directory TXT file, and then save to the data oh, it is so simple, let's take a look at how I have TXT file content saved to the MySQL data table. <?php include ('.. /boke/inc/re_conn.php '); Checkdir (' file/'); function Checkdir ($dir _path)//Traverse directory {if Is_dir ($dir _pat ...

The PHP tutorial saves the uploaded map to the database tutorial and displays the code//Connect to database $errmsg = ""; if (! @mysql tutorial _connect ("localhost", "root", "")) {$errmsg = "cant c ...