MySQL

What is the long connection?: It is a connection multiplexing;In the Lua-resty-mysql in Openresty.The Connect method goes to Ngx_lua cosocket connection pool to find out if a connection is availableIf there is a direct re-use;If a new connection to

1. Look under the current server, what are those libraries (database)?Answer: show databases;2. How can I create a database?A: The database name is the last face of the create, and the semicolon ends3. Select a databaseWhen you make a table, row,

sometimes we're less efficient in locating systems. Query syntax, you need to open the slow query log, which is slowquery Log . The command to open the slow query log is as follows:ViewMysql> showvariables like '%slow% ';+---------------------+------

Although the old tunes, but sometimes also need to use, from the online search for the prototype modified decentralized

1. First verify that the server is in a secure state, that is, no one can connect to the MySQL database arbitrarily.Because the MySQL database is completely password-protected during the reset of the root password of MySQLStatus, other users can

The role of foreign keys: foreign keys have a mechanism to maintain data integrity and consistency.① foreign keys can only point to the primary table or the primary key column of this table or uniqueThe data type of the ② foreign key should be the

1. There are two ways to install MySQL first: The MSI installation, which is as simple as installing Windows software. The other is the zip installation method. This is comparatively troublesome. Novice recommended MSI installation method. The

1. First use EXE file to install Python-mysql. Link: Http://pan.baidu.com/s/1kVqILTX Password: Manj.2. After the virtual environment is created, we copy the four files that have been installed in the public environment using EXE to the corresponding

[Client]Port = 3306Socket =/tmp/mysql.sock[Mysqld]Port = 3306Socket =/tmp/mysql.sockBasedir =/usr/local/mysqlDataDir =/data/mysqlPid-file =/data/mysql/mysql.piduser = MySQLBind-address = 0.0.0.0Server-id = 1 #表示是本机的序号为1, which is generally the

Self-configured Xwamp environment, the default is not detailed configuration of MySQL My.ini, on the one hand, different server configuration, on the other hand, the default is empty the way has not experienced problems. But recently the server

Back up the MySQL database#! /bin/bashBpath=/home/backup/mysql_bakUser= "Root"Passwd= "123456"Host= "192.168.1.5"date=$ (Date +%y-%d-%m)if [!-d "$BPATH"];thenMkdir-p $BPATHFidb=$ (mysql-u $USER-H $HOST-P $PASSWD-bse ' show databases ')For database

In daily development, it is often necessary to sort the data in the database, which can be sorted by the program in-memory, but the sort needs to query the contents from the database, use the program algorithm to sort, and then update the sorting

0. Download:Figure 1Figure 2Figure 31. Configure Default FilesIn fact, in theory now it is possible to install the service directly, but because it is the default configuration, we use a lot of problems. For example, the Chinese characters are all

I would like to say that in the "Code Audit: Enterprise Web Code Security Architecture" in the book 10 kinds of MySQL error injection, it is very clear.Interested please go to read, if for some reason did not read still want to understand, then

MySQL Add, delete, check, change Registration, Authorization#创建一个对数据库中的表有一些操作权限的用户, where operation can be replaced with all privileges, DBNAME, TableName can be replaced with *, which means all mysql> grant operation on DBNAME. TABLENAME to '

1. mysql Queries all tables:SELECT table_name from INFORMATION_SCHEMA. TABLES WHERE table_schema = ' database name ' and Table_type = ' base TABLE 'MySQL Query build Table statement:Show create table ' table name '2.mysql Querying all Views:SELECT

1. Reading data from memory is a microsecond level. Read from disk is the millisecond level. The two differ by an order of magnitude. So to optimize the database, the first thing to do is to optimize the IO.2.key_buffer_size[Global] Sets the size of

Solve the problem related to mysql inserting Chinese Characters in centos 7 After mysql is installed, the database abc is created, and a new abc table is created. There is no problem in English language insertion, but there is a problem in Chinese

A Chinese garbled solution (percent error) occurs when ajax/fetch uploads rich texts ), Recently, I am writing my own project. I encountered the problem of garbled Chinese characters in the rich text parameters received by the nodejs background.

Win7 installation MySQL-5.7.16 process, win7mysql-5.7.16 1. Create a MYSQL folder on drive C;2, copy the mysql-5.7.16-winx64 to the C: \ MYSQL folder, renamed mysql-5.7.16;3, in the mysql-5.7.16 directory, create my. ini file, the content is as