MySQL

If the MySQL careless operation error results in data errors or lost at this time Binlog played a great role in recovering there are several ways 1. Recovery by Time--start-datetime  If the point of time is determined, then recovery by time is a

MySQL server is installed under Windows Configure the My.ini file in the installation directory after decompressionBasedir = "D:\Program files\mysql\mysql Server 5.7"DataDir = "D:\Program files\mysql\data"Port =3306Basedir for MySQL installation

Rdbms---------------Table:field, Record,Sql---------------CrudINSERT INTO TableName (ID,...) VALUES (1, ' SSS ',...);Delete from tablename where id = 1 or id = 3 or id = 5;Delete from TableName where ID in (1,3,5); //in () range operation = =

MySQL database garbled problem, in order to check the following sequence, step by step to eliminate the error location.It is best to use UTF8 encoding for all encodings .Page page encoding using UTF8:Then check the connection to MySQL database when

General steps for MySQL optimization:1. Understanding the execution efficiency of various SQL through the show status commandSHOW Status provides state information for the MSYQL serverIn general, we just need to know the instructions that start with

Scenario: After migrating the MYSQL5.5.25A data directory (migrated from/var/lib/mysql to/data), the database cannot be started, service MySQL start is executed, the PID cannot be updated, and the error log under the old and new data directory has

The first step: Download this package, the command is:wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpmStep Two: Install, command:RPM-IVH mysql-community-release-el7-5.noarch.rpmThe third step: check whether the installation is

1. Installation configuration 2. Start the MySQL service and configureMysql>\s (status is OK) View current server Status View encoding status server Characterset:utf8 Db C Haracterset:utf8 Client CHARACTERSET:GBK Conn. CHARACTERSET:GBK

Select Sql_calc_found_rows * FROM (SELECT * To oses_vehdata201606 UNION ALL SELECT * from oses_vehdata201605) T wher e 1=1 and t.check_time between ' 2016-06-23 00:00:00 ' and ' 2016-06-23 23:59:59 ' ORDER BY check_time DescResults: 45.66 S,

1: Use the show statement to find out what database currently exists on the server:Mysql> SHOW DATABASES;2:2. Create a database Mysqldatamysql> CREATE DATABASE Mysqldata;3: Select the database you createdmysql> use Mysqldata; (press ENTER to appear

Example 1: Establishing a database named XHKDBmysql> CREATE DATABASE xhkdb;Example 2: Displaying a databaseCommand: Show databases (note: There is a last s)mysql> show databases;Example 3: Deleting a databaseExample: Delete a database named

Mysql optimization and troubleshooting First, we will introduce several keywords. 1 show status indicates the current status data of the database Show [session | global] status session is the statistical result of the current connection. global

How to solve the problem of ID auto-increment in MySQL table sharding and mysql id-incrementing After we perform the table sharding operation on MySQL, we cannot rely on the automatic increment of MySQL to generate a unique ID, because the data has

Summary of MySql Stored Procedure learning and mysql Stored Procedure What is a stored procedure: Stored procedures can be said to be a record set, it is a code block composed of some T-SQL statements, these T-SQL statement code implements some

MySQL common time functions (recommended) and mysql Functions 2.6 DATE_SUB/DATE_ADD DATE_SUB (date, INTERVAL expr type) The date parameter is a valid date expression. The expr parameter is the time interval you want to add. SELECT id FROM my_table

Mysql 5.7.13 installation and configuration method graphic tutorial (win10), 5.7.13win10 MySQL is a relational database management system developed by MySQL AB, a subsidiary of Oracle. It is one of the best and most popular relational database

Batch add fields for mysql tables and mysql tables This similar table Shard is used in the project. What should I do if I want to add a field? 　　   Dba said that it would be enough to get a script for batch processing. In a slot, where would it be?

How to install and uninstall the mysql service in windows (mysql 5.6 zip unzip version installation tutorial), mysql5.6 MySQL is a small and exquisite but powerful database, which is very popular at present. However, the official website provides

MySQL5.5.21 installation and configuration tutorial (win7), mysql5.21win7 Follow these steps to install mysql in Win7: 1. First, click the Installation File of MySQL5.5.21. The installation wizard interface for this database appears. Click "next" to

Mysql reports Row size too large 65535 reason and solution, row65535 Error message: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 65535 When a field type of mysql table plug-in is text or a field type of