MySQL

Functions for escaping special characters in PHP MySQL One is: mysql_escape_string One is: addslashes The difference between mysql_escape_string and addslashes is that Mysql_escape_string always converts "'" to "\" And addslashes Convert "'"

MySQL migration toolkit is a database migration tool officially provided by MySQL. It can convert any data source to MySQL DATA, or convert Mysql Data to other types of data. Java support required Supported database migration

Because the default character encoding of MySQL is Latin1, most non-letter characters are not supported. Therefore, after installation, you must modify the character encoding first. Open the my. ini file in the MySQL installation directory. The

1. View A view is a virtual table. Unlike tables that contain data, a view only contains queries for dynamically retrieved data during use (that is, including an SQL query). It is only a facility for viewing data stored elsewhere. Basic View

Turn: http://www.21andy.com/blog/20071102/655.html Command for backing up MySQL databaseMysqldump-hhostname-uusername-ppassword databasename> backupfile. SQL Back up the MySQL database in the format of a table with deletionBacking up a MySQL

Check the default link encoding of MySQL on the master and slave servers, especially the slave server. Otherwise, garbled characters may occur during synchronization. [Mysqld] Server-id = 2Slave-Skip-errors = allDefault-character-set =

MySQL primary and foreign key creation:(1) Ensure that the referenced tables and fields exist.(2) The associated table must be of the InnoDB Storage type.(3) The primary key of the primary join table must be set.(4) The primary key and foreign key

Modify the my. ini file Add Default-character-set = gb2312 Set database character sets Alter database da_name default Character Set 'charset' 1) set the database encoding/etc/My. CNF[Mysqld]Default-character-set = GBK...[Client]Default-character-set

Http://hi.baidu.com/289766516/blog/item/a3f85500556e2c09728da5e1.html Method 1:Truncate table your table name// This not only deletes all data, but also relocates the auto-increment Field Method 2:Delete from your table nameDBCC checkident (your

In SQL, we sometimes use in the query statement to query related data. For example: Select * from goods where goods_id in ('20160301', '64', '20160301', '37', '20160301', '20160301', '20160301 ', '123', '123', '123', '123 ') In the preceding

Sometimes we need to optimize MySQL. So what improvements should we make to MySQL? A special query? Database mode? Server hardware? The only way is to measure what your system is doing and its performance under various conditions. This is what we

This parameter means that before the table is closed, the update operation of the table refers to the disk with the new data instead of the index to the disk, and the changes to the index are recorded in the memory. In this way, the MyISAM table can

There are two tables, Table Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->CREATE TABLE `a` (`id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,`fid` smallint(6) unsigned NOT NULL DEFAULT '0',`cnt`

In most cases, when the alter table operation is performed, a temporary backup of the target table (temporarily named a) is copied (temporarily named B). The alter operation is performed on the backup file (B) and then delete the target table (a).

I have only recently started working heavilyWith stored procedures and functions in MySQL. After years inOracle world with advanced stored procedures, functions and packages,I 've had to come to grips with the same comings of MySQL. One of thoseIs

The following methods are used to test on my VM. The memory is 384 Mb, the swap partition is 1024 MB, and the test has 3.5 million data records. The requirement is as follows: Code highlighting produced by Actipro CodeHighlighter

As the name implies, "memory tables" are created in the memory. Is that true? In fact, the MySQL memory table and table structure are created on the disk and the data is stored in the memory. Therefore, when MySQL is started, the table exists and

There are many possible causes of garbled characters, but they are usually caused by inconsistent encoding. The Garbled text problem today is caused by inconsistent file encoding and database connection encoding, to add initialization data for batch

6.4.1. Dumping data in SQL format Mysqldump This section describes how to useMysqldumpTo create SQL-format dump files. For information about reloading such dump files, see Section 6.4.2, "reloading SQL-format backups ". By default,MysqldumpWrites

Simple MySQL database operations1. Create a database Use the show databases command to display the names of all created databases.Create Database xxx; Create a database named XXX. For example, mysql> Create Database test;   Ii. Create a form