drop database

Show the existing database by showing Syntactic: Show DATABASES [like Wild] If you use the like wild section, the wild string can be a string that uses the SQL "%" and "_" wildcard characters. Features: Show databases lists the

The importance of data backupIn a production environment, the security of data is critical, and any loss of data can have serious consequences. The importance can be reflected in the following points:1. Improved system high availability and disaster

1. mysql commands the user to connect to the databaseMySQL command format: mysql-h host address-u user name-P user password(1) Connect to MySQL on this computerFirst open the DOS window, then enter the directory Mysql\bin, and then type the command

1. Create database IF not EXISTS yourdbname DEFAULT CHARSET UTF8 COLLATE utf8_general_ci;Create DATABASE Yourdb DEFAULT CHARACTER SET gbk COLLATE gbk_chinese_ci;2. Switch database use DatabaseName;3. Deleting a databaseThe drop command is used to

1.linux commands to start MySQL:Mysqladmin start/ect/init.d/mysql start (front of MySQL installation path)2.linux Restart MySQL command:Mysqladmin restart/ect/init.d/mysql Restart (front of MySQL installation path)3.linux the command to turn off

1.linux commands to start MySQL:Mysqladmin start/ect/init.d/mysql start (front of MySQL installation path)2.linux Restart MySQL command:Mysqladmin restart/ect/init.d/mysql Restart (front of MySQL installation path)3.linux the command to turn off

db:11.2.0.3.0Oracle DBLINK is created into private and public DBLINK, which is created by default as private; Private Dblink only the created schema can be deleted, SYS can not be deleted, public dblink any schema can be deleted, as long as the

1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

1. Connect MySQLFormat: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to lose

SQLServer checks whether the object exists and does not exist. 1 checks whether the database has SQL code ifexists (select * fromsys. databaseswherename 'database name') dropdatabase [database name] ifexists (select * fromsys. databaseswherename

Mysql master-slave replication, mysql master-slave Master-slave replication: There are two ways to start master-slave replication from MySQL5.6: Log-based (binlog); GTID-based (global transaction identifier ); 1. Log-based master-slave replication

Use SQL to operate MySQL database Abstract: This section describes various SQL statements. This section describes Database-level SQL statements, operations such as viewing, creating, and deleting. This section introduces various SQL statements.

Mysqldump Mysql provides the msyqldump tool to export the database. After searching for articles on the Internet, most of them are from one article, with a wide range of contents. Most of them are not used. I sorted out some of the options I used

The following articles mainly describe the actual application of MySQL permission escalation and security restriction bypass vulnerabilities. I saw the actual application of MySQL permission escalation and security restriction bypass vulnerabilities

1. manually delete the file system database 1. the stop listening and OEM code is as follows: $ lsnrctlstoplistener_name $ emctlstopdblele2. obtain information about the data file, log file, and control file, including the archive code: $

The following articles mainly describe the actual application of MySQL permission escalation and security restriction bypass vulnerabilities. I saw the actual application of MySQL permission escalation and security restriction bypass vulnerabilities

Hot backup uses the mysqldump command for backup. This tool is a built-in MySQL backup and recovery tool with powerful functions. it can back up the entire database and back up multiple databases, you can back up a single table or several tables.

Mysql entry-level series: create, delete, and select databases for MYSQL [group chart] 3.3 create, delete, and select databases MySQL provides three DATABASE-level statements: create database is used to CREATE a DATABASE, drop database is used to

Documentation for mysqldump: http://dev.mysql.com/doc/refman/5.1/zh/client-side-scripts.html#mysqldump MysqldumpIt is most commonly used to back up an entire database: shell> mysqldump db_name >backup-file.sql You can read the dump file back to the

What do you do if you want to analyze data in the database at a specific time? For example, what measures do you take if you want to analyze the data at pm? The most frequently used method is to create a scheduled task, perform a backup at, and back