MySQL

//-----------------------------------Select----------------------------------Importjava.sql.Connection;ImportJava.sql.DriverManager;ImportJava.sql.ResultSet;Importjava.sql.SQLException;Importjava.sql.Statement; Public classtestselect{ Public Static

For automated operations, such as backup recovery, DBAs often need to encapsulate SQL statements into shell scripts. This paper describes several methods of SQL statements for shell scripts in MySQL database under Linux environment, for your

The newly installed MySQL will present anonymous users.Enter MySQL at the command line (if the prompt is not an external or internal instruction, add the bin directory under the MySQL server file to the path of the system paths)If there is no prompt,

1. List all the character sets supported by MySQL:SHOW CHARACTER SET;2. Current MySQL server character set settingsSHOW VARIABLES like ' character_set_% ';3. Current MySQL server character set checksum settingsSHOW VARIABLES like ' collation_% ';4.

First, the hardware environmentMaster:dell R720 Intel (R) Xeon (r) CPU e5-2640 v2 @ 2.00GHzMEM 64g,disk 4*2.5 SAS network -GigabitSlave:dell R720 Intel (R) Xeon (r) CPU e5-2640 v2 @ 2.00GHzMEM 64g,disk 4*2.5 SAS network -GigabitSecond, the

MySQL command line export database:1. Go to the Bin folder in the MySQL directory: cd MySQL to the Bin folder directoryAs I entered the command line: CD C:\Program files\mysql\mysql Server 4.1\bin(or add the directory to the Windows environment

Blog "" Using I/O streaming way to achieve the MySQL database backup, this method is more complicated, the following describes another way to back up the MySQL database:Import java.io.file;import java.io.ioexception;/** * MySQL Database backup * *

First go to MySQL:Mysql-u RootIf you have a password, you are prompted to enter itThen enter the following authorization code,The following is the authorized user root to use the password admin123 from any host to connect to the MySQL serverGRANT

Table TesterField: ID--INTDate--TIMESTAMP　　1, how to search by year, month and day group?Select Date_format (date, '%y-%m-%d ') time, COUNT (*) count from TESTER Group by (date), month (date), day (date);Where year (), month (), day () are extracted

[Mysqld_multi]Mysqld =/usr/bin/mysqld_safeMysqladmin =/usr/bin/mysqladmin[Mysqld1]datadir=/mnt/mysql/3306Socket=/tmp/mysql3306.sockPid-file=/mnt/mysql/mysql3306.pidLog-error=/mnt/logs/mysql/3306/error.log#general_log

Most of the time, we need to know what SQL statements MySQL has executed, such as when MySQL is injected, need to know what is causing the damage and so on. As long as there is a record of the SQL statement, you can know the situation and make

backup and restore of MySQL under LinuxBackup[[email protected] ~]# cd/var/lib/mysql (go to MySQL library directory, adjust the directory according to your MySQL installation situation)[[email protected] mysql]# mysqldump-u root-p voice>voice.sql,

/*****************************************************mysql 5.6.19 upgrade to 5.6.21************************************ /Pre-upgrade is required!----1. View the existing version of MySQL data directory location show variables like '%datadir% ';/usr/

Typically, a single-day log records only the log information for the day, and if you need to see the log information within a month, you need to stitch the daily log table result collection, usually with union.Storage process:Drop PROCEDURE if

With a friend, a good company supervisor. When communicating with the index in MySQL in conditional query and sortMysql> Explain select * from article where title= ' Hope PV Enterprise survived 2 months ' ORder by ID desc\\\\\\\\g1. Row *************

Grammar:Load data [low_priority] [local]InFile ' File_path ' [replace] [ignore]into table table_name [(column_list)]lines[terminated by ' string ' starting by ' string ']--------------------------------------------------------------------------------

Requirement: After you insert a record into the MySQL database using MyBatis, you need to return the self-increment primary key value for that record. Method: Specify the Keyproperty property in Mapper, as in the following example: XML code

Today, I'm helping colleagues. View a deleted SQL statement execution errorThe SQL statements are as follows:1 DELETE from as WHERE T.resourceid='4028812348f28b890148f29253a80000'This SQL statement can be executed in the Oracle database, but the

Use MySQL;Grant USAGE on *. user_name ' @ ' localhost ' identified by ' 123456 ' with Grant option;//authorized user_name user to access the database with password 123456Grant Select,insert,update,delete on db_name.* to ' user_name ' @ ' localhost '

Mysql Error 1146 Tabel doen't exist Error caused by high-Case sensitivity in MySql, tabeldoen MySql Error 1146 Tabel doen't exist. Generally, the table does not exist, or the table name is incorrect and the permission is incorrect. I encountered