MySQL

First, the configuration MySQL Database1, unzip the green version of MySQL, and renamed to mysql5.7, such asCompare The previous versions of 5.6, with fewer data directories ( storage ) and My-default.ini file (configuration information)Second,

I. Related operations of the database1. Create a databaseCreate Database dbname;2. See what databases are in the systemshow databases;3. Choose which data to useUse Daname4. See what data tables are in a databaseUse dbnameShow tables;5. Deleting a

Index functionIn addition to the ordered lookups mentioned above, the database uses a variety of fast location techniques to greatly improve the query efficiency. In particular, when the amount of data is very large and the query involves more than

"Transaction" a set of SQL statement action units, all SQL statements within the group, to complete a business .If the whole group succeeds, it means that all the operations in the group are successful;Conversely, if any one of these statements

Today, finally the MySQL database knowledge system over, the following to sort out some common basic operations.First, the MySQL server startup and shutdown1. Start the MySQL serverStart and run input "cmd", then enter "net start MySQL" at the

first, from the operating system, said :1. We know that MySQL is cross-platform and it can run on many platforms such as Windows, Linux, Unix (MAC). Linux is Unix-like,But Windows and Linux have a very big difference. Windows: File names are

I. Index:1. Creating a generic index CREATE INDEX index_name on table_name (columnname[...]);2. Parse SQL execution Statement add explain Eg:explain SELECT * FROM table_name before select;3.mysql defaults to INNERDB as the default storage engine

One. Common MySQL command-line commands1. Start MySQL service net start MySQLStop MySQL service net stop MySQL2. Netstat–na | findstr 3306 View the port being monitored, findstr is used to find out if there is a port in the back3. Log in to the

Step 1Official website: https://dev.mysql.com/downloads/mysql/Select the manual installation version:Unzip to the D drive under the MySQL folder:Two. ini files are missing from the previous version, copied directly, modified, My.ini:[Client]port=3306

MySQL remote connection with mysql command line or JDBC is slow and far more than ping time. Search the Internet for a moment, the solution is as follows:In the [mysqld] section of the/etc/mysql/my.cnf file, add: Skip-name-resolve, save the file,

Windows:1. Log into the system with the system administrator.2. Stop the MySQL service.3. Go to the Command Window (CMD) and enter the MySQL installation directory, for example, my installation directory is c:\mysql, enter C:\mysql\bin4. Skip

The MySQL system database primarily stores some system information tables that store MySQL services. In general, MySQL library tables are Myasim engines, except in individual cases. The functions of the MySQL library table can be broadly divided

CMD under connect MySQL-u-proot-U behind username,-p with password, notice no space after-pAssuming that the MySQL command is not found, add the bin path to the MySQL installation folder under environment variable path (C:\Program Files (x86) \mysql\

One, try not to be a word database do operations1, try not to do the database operation,2, move the complex operation to the CPU3, apply MySQL as simple as possibleSecond, the Control table data volume1, Pure int no more than 1000w2, with char not

Delete operation in the execution of the statement is the DELETE statement that can be followed by the Where condition to delete the specified row, of course, can not add the where condition, all the data is deleted to clear the execution of the

Install the MySQL module first.node. js is installed by default, the module file is placed in the/usr/local/lib/node_modules directory, in order to manage cheaply, the module is unified installation here.$ cd /usr/local/lib $ npm install

A field may correspond to multiple data, and a MySQL implementation combines multiple rows of data into one row of dataFor example, an activity ID (Activeid) corresponds to multiple module names (modelname), according to the general SQL statement:1

MySQL Change environment default character set is Utf-8 (of course you can also set to other, international point or utf-8 Good)assume that the MySQL character set is not unified. There's still a bit of trouble back there.first you have to turn off

MySQL multi-instance, simple to understand is on a server, the MySQL service to open a number of different ports (such as 3306, 3307), running multiple service processes. These MySQL service processes use different sockets to listen to different

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