MySQL

Therefore, we need to do a good job of MySQL query optimization. The following is a simple example that shows how different SQL statements affect query speed: There is such a table test, which has a self increasing ID as the primary index. To query

 include (' global.php ');   code is as follows copy code  if ($_post[' Sub ']) {    $user   = $_post[' username '];    $pwd    = MD5 ($_post[' Password1 ']. $user);    $email = $_post[' email '];     $q =

A bug report has been submitted for a bug in Windows version of MySQL that does not use UDF. But It seems to me that I made a mistake, and the MySQL technical support staff gave me the perfect solution to share A moment. Below is the original reply:)

Create procedure [dbo]. [Prgs_nation_task_getlist]@PageSize int = 100--Displays the number of record bars per page, defaults to 100@PageIndex int = 1,--current fetch page number to display, default is 1, database returns one page of data based on

You must be on the same machine as MySQL, you must be connected as a MySQL root user, and the root user must have Insert permissions and reload administrative privileges on the MySQL database. In addition, if you change the root password, you must

Operator PrecedenceThe following list shows the order in which operator precedence is from low to high. Operators that are arranged on the same line have the same precedence. := | |, or, XOR &&, and Not BETWEEN, case, when, THEN, ELSE =, , >=,

GROUP by (aggregate) functionsThis chapter discusses group (set) functions for a set of numeric operations. Unless otherwise stated, the group function ignores NULL values. If you use a group function in a statement that does not contain a roup by

1, test procedure.DELIMITER $$DROP PROCEDURE ' t_girl '. ' Sp_split_table ' $$CREATE PROCEDURE ' t_girl '. ' Sp_split_table ' ()BEGINdeclare done int default 0;DECLARE v_user_name varchar () default ";DECLARE v_table_name varchar () default ';--Get

Analysis issues Troubleshooting login MySQL view with show VARIABLES like ' character% '; The default character set for Character_set_database and Character_set_server is latin1. +--------------------------+----------------------------+|

Textarea always has a lot of space issues to solveProblem description:There is always a lot of space at the end of the header when php reads mysql data to textarea. There is no space in viewing data in the data table.Cause:The content should be

To solve the problem of garbled characters inserted into the Chinese database:Most of the problems are caused by converting Chinese into UTF-8. The code is as follows:Copy code $ Str = iconv ('gbk', 'utf-8', $ str ); If not, check whether the

Today, apache2.0.x + php5 + mysql5 is deployed on the machine. When the CMS system is deployed, it is found that php5 does not support mysql by default.Open the php. Ini file and findExtension = php_mysql.dll, remove the semicolon,Restart apache.

Generally, we will give a system disk when purchasing VPS, which is generally between 10 GB and 40 GB. When there is a large amount of data on your website, we will consider purchasing a data disk, then place the website data and MySQL database

If (get_magic_quotes_gpc () = 1 ){?> MySQL common query program Note that in this program, magic_quotes_gpc in the PHP configuration file (PHP3 is php3.ini and PHP4 is php. ini)Set it to Off or 0. Restart Apache after modification.Exit

In the previous article, we talked about logon, adding users, and changing passwords. Next, let's take a look at the database operations in MYSQL. Note: you must first log on to MYSQL. The following operations are performed at the MYSQL prompt and

The following is the file code for backing up a Mysql database through Apache PHP in Linux:File 1. Listtable. php (the file lists all tables in the database for backup)Select the table to back up:$ Con = mysql_connect ('localhost', 'root', 'xswlily '

During our website design and production process, it is more convenient to save images to the database than to save them as files. PHP and MySQL can easily implement the above functions. In this article, we will show you how to save images to the

. Database record operation functions (5 ):1. mysql_fetch_array ()Format: array mysql_fetch_array (int query );If the execution is successful, an array is returned. The array contains the value of the next record. If the execution fails, False is

You must have used the database import and export function in phpmyadmin, which is very convenient. However, in practical application, I found the following problems:1. The size of the database exceeds a certain size. For example, if the size of 6

Preparation1. Configure the firewall and enable port 80 and Port 3306.Vi/etc/sysconfig/iptables-A input-m state -- state NEW-m tcp-p tcp -- dport 80-j ACCEPT # Allow port 80 to pass the firewall-A input-m state -- state NEW-m tcp-p tcp -- dport 3306-