MySQL

Where you can search by multiple criteria.The Products table is as follows:a where is searched with and after two conditions and three conditions:b use or to search for multiple conditionsC This is a bit of a point, find out that the price of 1002

Today, when a friend is doing a program project, I need to modify MySQL to modify the default character set, can not find me help. Baidu has tried several blog posts in the method, and finally succeeded. But feel those blog post ideas a bit messy,

http://blog.csdn.net/piaolankeke/article/details/6272214MySQL writes data typically with INSERT statements, such as[C-sharp]View Plaincopy INSERT into person values (Zhang San, 20), (John Doe, 21), (Harry, 70) ...; But sometimes in

1, every time after a period of online business will appear the following error:kHost ' XXXXX ' is blocked because of many connection errors; unblock with ' mysqladmin flush-hosts ' Connection closed by foreign host2, need to use mysqladmin

"Clustered Environment"Management node 10.0.0.19Data node 10.0.0.1210.0.0.17SQL Node 10.0.0.1810.0.0.221. Add MySQL User# groupadd mysql# useradd mysql-g MySQL2. Install Mysql-cluster 7.3.5-linuxThe above steps 5 machines are to be executed3.

The data processing function sometimes obtains from the database table to take some processing. If you replace the lowercase letter with the corresponding uppercase letter. This process can be done on the client or on the database. is more efficient

MySQL will appear in Chinese garbled reason is the following points:The 1.server itself sets the problem, for example still staying in Latin12.table language setting problem (including character and collation)3. The connection language setting

Installation method is divided into rpm and source code compiled installation Two, this article is the use of MySQL source code compilation, the compiler uses CMake. The software requires mysql-5.5.29.tar.gz and cmake-2.8.10.2.tar.gz, please

SELECT statement:The Products table is as follows:A a list of:mysql> select Prod_name from the products;b Retrieving multiple columns from the table: Mysql>select prod_id, prod_name from the products;C Retrieve all Columns:mysql> SELECT * from

Transferred from: http://blog.sina.com.cn/s/blog_6e322ce70100xwve.html1, transaction processingInnoDB supports transactional features, MyISAM not supported. Myisam executes faster and performs better. 2,select, UPDATE, INSERT, delete operation

1The so-called Trigger refers to an action that sets up a table (Insert,Update,Deleteat the same time, an operation that is triggered at the same time; generally used, for example, to delete the main column of the article, then you can use the

Outline1. Functions2. Text Processing function3. Numerical calculation function4. Date processing function5. Aggregation function1. FunctionsFunctions are useful, but not universal:650) this.width=650; "src="

MySQL supports one-way, asynchronous replication, one server acting as the primary server during replication, and one or more other servers chargingWhen from the server. The primary server writes the update to the binary log file and maintains an

When using the MySQL database, the first time you log in, Root does not have a password by default. In the use of the process will inevitably forget the root user's password, the password is incorrect, reported the following error:I:\develop\mysql-5.

Direct backup mysqldump-u user name-p password-h 192.168.1.15-c--default-character-set=utf8 database name >XXX.SQL use gzip compressed backup mysqldump-u user name-p password -H 192.168.1.15-c--default-character-set=utf8 database name | Gzip

MySQL's numeric data types can be roughly divided into two categories, one is an integer and the other is a floating-point or decimal. Many different subtypes are available for each of these categories, and each subtype supports data of different

Recently, due to the need for a general study of MySQL random extraction implementation method. For example, to randomly extract a record from the TableName table, the general notation is: SELECT * from TableName ORDER by RAND () LIMIT 1.But then I

Today found/usr/local/mysql/var under a lot of mysql-bin.000001, mysql-bin.000002 files, Google's. This is the operation log of the database, such as update a table, or delete some data, even if the statement does not have matching data, this

Original link: http://blog.sina.com.cn/s/blog_718ac8bf0100pkvp.htmlThe following is a detailed configuration of the MySQL database server configuration file My.ini. Applications are InnoDB engines,2-core CPUs, and 32-bit SUSE. [Client]#password =

When we use mysqldump to back up data, we have the option-where/-w. You can specify the backup conditions. The options are described as follows: -W, -- where = name Dump only selected records. Quotes are mandatory We can perform a test, for example: