MySQL

The database table is as follows Mysql> select * from Tb_account; +----+-------+------+ | id | name | age | +----+-------+------+ | 1 | ciaos | 3 | | 2 | Stone | 6 | +----+-------+------+ Installing Sphinx Yum Install Sphinx libsphinxclient-devel

The slow query log feature is not turned on by default, and it records a value that executes longer than the parameter Long_query_time (default is 10) and the number of rows accessed exceeds the SQL statement that the parameter

Given what has been done recently, it is necessary to solve the problem of slow SQL, now add a little bit of SQL statement performance analysis of the explain !Comprehensive return data situation, analysis of the parameters, you can understand the

after installing Mysql-serveryou will be prompted to run mysql_secure_installation. Running Mysql_secure_installation will perform several settings:a) Set a password for the root userb) Delete Anonymous accountc) Remove the root user from remote

Common reading and Writing methodsInternal implementation based on program codeSelecting categories in code according to select, insert, which is often used in production, is the most efficient, but cumbersome for developers. Architecture cannot be

I tried to use the company's database byMSSQL migrated to MySQL, get a bit of experience Rumor: Migrating a relational database to a non-relational database is simple, but migrating a non-relational database to a relational database is very

Could not load file or assembly ' MySql.Data.CF, version=6.4.4.0, Culture=neutral, publickeytoken=c5687fc88969c44d, Retargetable=yes ' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from hresult:0x80131047

MySQL Character set tuning summary--http://xjsunjie.blog.51cto.com/999372/1355013The character set is a set of symbols and encoding rules, whether in the Oracle database or in the MySQL database, there is a character set selection problem. For the

One, install MySQLIf you are a Windows user, MySQL installation is very simple, download the installation files directly, double-click the installation file step by steps.Linux installation may be more simple, in addition to download the

Introduction: Principle and mechanism of master-slave replicationto implement replication, you must first open The binary log(bin-log) function on the Master side , otherwise it cannot be implemented. Because the entire replication process is

STEP1: Open navicat official website, download navicat, website: http://www.navicat.com/en/download/download.htmlSTEP2: Go to the download directory, unzip the TarballDecompression command: TAR-ZXVF navicat11_mysql_en.tar.gzSTEP3: Open the unpacked

First, let's start by talking about what is PDO?The encyclopedia saysThe PDO extension defines a lightweight, consistent interface for the PHP Access database, which provides a data access abstraction layer so that queries and data can be executed

One. About table joins1. The table connection mainly includes the outer connection and the inner connection, the inner connection only selects the matching records in the two tables connected, but the outer joins will select other mismatched records.

The differences between MySQL semi-synchronous and asynchronous replication are as seen in the schema diagram above: In the case of MySQL asynchronous replication. After MySQL master server transmits its binary log through the replication thread,

MySQL in the Ubuntu terminal under the problem of Chinese garbled:First, learn to modify the MY.CNF configuration file without changing the database.The main is to setdefault-character-set=utf8But the database restarts after the setup

Just to test a thing, I wrote a stored procedure:delimiter $$Drop procedure if existssp_test$$Create proceduresp_test ()begin DeclareV_cntint; SetV_cnt= 0; whileV_cnt 100000 DoInsert intoT1SelectV_CNT, v_cnt+1, v_cnt+2, v_cnt+3; SetV_cnt=V_cnt+ 1;

Unlike SQL SERVER creating temporary tables, you cannot write directly to the CREATE TABLE #Test_TableInstead, you need to add the temporary (temporary) keyword between Create and tableCREATE Temporary TABLE test_table (NAME VARCHAR (Ten) is not

Mysql allows remote connection, I. Overview This article describes how to create a remote connection table through the federated storage engine. Test environment: mysql 5.6.21 Step 2 Enable federated storage engine Check whether the federated

Collect and sort out common mysql SQL skills, If you don't talk much about it, You can directly post code to everyone. 1. Number Auxiliary table // Create table test (id int unsigned not null primary key); delimiter // create procedure pnum (cnt int

Summary of using the describe command in MySQL, 1. The describe command is used to view detailed design information of a specific table. For example, to view the design information of the guestbook table: describe guestbookdescribe ol_user userid 2.