MySQL

Now CMS system, blog system, BBS and so like to use tag tag as a cross-link, so I also use the next. But after using it found that I want to query a tag list of articles when the speed is very slow, up to 5 seconds! Baisibuxie (later finally solved),

Some of the functions recently used in MySQL, some of which are also first encountered, are recorded as follows:1. IsNull (expr)usage: expr is null, then the return value of IsNull () is 1, otherwise the return value is 0.2. Ifnull

1 MySQL 5.5.11 compilation installation1.1 System library related library files required for installationGCC gcc-c++ gcc-g77 autoconf automake zlib* fiex* libxml* ncurses-devel libmcrypt* libtool-ltdl-devel*1.2 Creating the MySQL installation

--The review and advanced of MySQL--Create a fully structured tableCREATE TABLE Tab1 (ID int (5) NOT NULL Auto_increment primary key comment "This is id",Name varchar () NOT NULL default "ran",Age Int (2) is not NULL);--The ID cannot be added to the

MySQL database concurrency and transactional data aggregation InnoDB multiple version concurrency control-MVCChttp://my.oschina.net/xinxingegeya/blog/208821 MySQL concurrency controlhttp://my.oschina.net/xinxingegeya/blog/215417 MySQL's

Indexing is the key to fast searching. MySQL indexing is important for the efficient operation of MySQL. Here are a few common types of MySQL indexes.In a database table, indexing a field can greatly improve query speed. Suppose we create a mytable

Test on the basis of the previous LNMPvim/usr/local/nginx/html/test.php$link =mysql_connect (' localhost ', ' root ', ' MySQL server password, not in two single quotes empty ');if (! $link) echo "fail";else echo "Success";Mysql_close ();?>chmod

After starting MySQL, log in as root for MySQL[Email protected]:~# mysql-uroot-prootMysql> Show variables like ' character% '; #执行编码显示+--------------------------+----------------------------+| variable_name | Value |+--------------------------+------

In MySQL database, MySQL key_buffer_size is the most important to the performance of the MyISAM table, the following will be the MySQL key_buffer_size parameter settings in detail, for your reference. The following is a configuration with MyISAM as

Believe that paging query for many developers is a common thing, first according to the query criteria to search the page list data and total records, the total number of records is generally:Select COUNT (1) as total from xxx where .....This is

@ pour a table from the old database into a SQL file $mysql-uroot-p my_db > My_db.sql (enter password)@ Import $sudo apt-get install mysql-server-y (the password to initialize the root user) in the new environment $mysql-uroot-p

Show Table StatusMySQL official documentation inHttp://dev.mysql.com/doc/refman/5.1/en/show-table-status.htmlThe rows row here is the number of tables, but is not actually allowed. MyISAM is accurate, other storage engines are not allowed. You need

Scenario: Import a SQL file, but always fail after executing dozens of sentences of SQL, open the failure log as a sentence MySQL server has gone awayI used 2 steps, but it felt like the 2nd step was successful.1: First look at Max_allowed_packet,

MySQL handles duplicate dataThere may be duplicate records in some MySQL data tables, and in some cases we allow duplicate data, but sometimes we also need to delete the duplicated data.In this section we will show you how to prevent data tables

Unix timestamp converted to date function: From_unixtime () Select From_unixtime (1156219870); Date conversion to UNIX timestamp function: Unix_timestamp () Select unix_timestamp (' 2006-11-04 12:23:00′);

In general, to prevent the program from garbled in the process of interaction, so the front and back of the platform will agree to the encoding format.Because UTF-8 encoding is international, I set the encoding format UTF-8 in MySQL.Check the MySQL

——————————————————————————————————————————————————————————First, start and exit1. Go to MySQL: start MySQL Command line Client (MySQL dos interface) and enter the installation password directly. At this point the prompt is:mysql>2. Exit

Ms SQL refers to Microsoft's SQL Server Database Server , it is a database platform that provides a complete solution from the server to the end of the database, where the database server part is a Database management System for establishing, using,

Server: mysqld client: MySQLCommon Management Commands : (Note: All commands to be executed on the server end with; Login: Mysql–uuser–ppassword–hhost Specify the user, password and MySQL host can log in, you can also create a. my.cnf

Install and use Mysql in Ubuntu, using tumysqlSummary In this blog post, I will start from the basics and introduce the installation and basic usage commands of Mysql in Linux. It is only applicable to Mysql beginners ...... Install Mysql