MySQL

Article turned from: http://www.linuxidc.com/Linux/2014-03/98710.htmCold Backup (OFF, slow, point-in-time recovery)A cold backup occurs when the database has been shut down properly and provides us with a complete database when it shuts down

0. Defragment the table spaceOptimize table TableName1, table partition by year partition, quarter sub-partitionAlter TableKey_part Partition byRange Year(create_time)) Subpartition byHash (quarter (create_time)) Subpartitions4(Partition

Original: http://bbs.landingbj.com/t-0-243202-1.htmlBy default, MySQL sorts all group by col1, Col2, ...., and the method of querying is like specifying order by col1, col2, ... in a query.If you explicitly include an ORDER BY clause that contains

To view the slow query log for MySQL, first turn on the slow query record for MySQL.Check that the MySQL slow query record is turned on,Mysql> Show variables like ' slow_query% ';

A) Internal connection (equivalent connection): Query customer Name, order number, order price---------------------------------------------------Select C.name,o.isbn,o.priceFrom customers c INNER JOIN orders Owhere c.id = o.customers_id;-------------

1. DescriptionThis section contains a reference to MySQL reference manual Chapter III: Chapter 3 Tutorial.2. VersionDownload Install: Https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.22-winx64.zipThe latest version is: 8.0.11, because I have

1. Description: Create a default databaseCreate database name;2. Description: Create a database with the specified character encodingCreate database name character set character encoding format;3. Description: Delete Databasedrop database name;4.

Summary of some MySQL database surface questionsJune 16, 2016 11:41:18Hits: 4950One, what security should SQL statements consider?(1) Prevent SQL injection, escape from special characters, filter or use precompiled SQL statements to bind variables.(2

has not written a blog for a long time, usually feel no time to write, but there is a lot of time to wander, to do some useless things. Blogging is quite a process of training people, not only exercise writing ability, insist on writing can also

One: Paging needs:The client passes the start (page number), limit (number of bars per page) two parameters to page through the data in the database table, then we know that the MySQL database provides paging function limit m,n, but the use of this

A database is a warehouse that organizes, stores, and manages data according to its structure, and each database has one or more different APIs for creating, accessing, managing, searching, and replicating the saved data. Here are some terminology

Summary of COMMON commands: 12345678910111213141516171819202122232425262728293031323334353637 create database name;  Creating a database use databasename;  selecting a database drop database name;  Delete the database

Basic QueryFirst create a Students student table, add fields and insert data as followsTo create a stored procedure with no parametersSee the number of studentsDROP PROCEDURE IF EXISTS select_students_count; DELIMITER;; CREATE PROCEDURE '

For a MySQL database with a large number of accesses, the increment of the binary log is usually very fast, which is likely to surprise you. Like a racetrack, most of your disks will be filled with logs.Problems always need to be solved, and there

The password you set after creating the MySQL container inside Docker has an error when connecting to the remote host:First, if the MySQL image installed in the Docker will need to enter the MySQL inside: Refer to previous article:

starting with version 5.7 MySQL supports semi-synchronous replication by extension, and when the primary library performs an update operation transaction, the commit operation is blocked until at least one semi-synchronous, replication Slave

Transaction1. Definition: All operations must be completed successfully, otherwise all changes made in each operation will be revoked.2, the acid of the transactionAtomicity atomicity Consistency Consistency isolation isolation persistence

2.PHP and PDO extensions, process-oriented, objectexec ("Set names ' UTF8 '"); $ sql = "SELECT * from user where name =?"; $stmt = $pdo->prepare ($sql); $stmt->bindvalue (1, ' Joshua ', PDO::P aram_str); $rs = $stmt->execute (); if ($rs) { //PDO::

Deal with inventory oversold situation, first understand what is optimistic lock and pessimistic lock, the following several blog has been introduced more detailed, I will not repeat its principle"MySQL" pessimistic Lock & optimistic

MySQL 5.6.37 Compile and install what is a database?Simply put, the database is a repository of data, which is organized and stored according to a certain data structure (data structure refers to the organization or data), and we can manage the data