MySQL

MySQL sets the encoding command environment: MySQL Sever 5.1 + MySQL command line tool problem: MySQL sets the encoding solution:[SQL] SET character_set_client = utf8; www.2cto.com supplement: MySQL views all character set commands supported by the

MySQL Case sensitivity and naming rules Note: For most of the content in this article, refer to relevant articles from the Internet 1. in MySQL, a database corresponds to a folder, and tables in the database are stored in the folder as files, the

In the execution sequence of mysql statements, is the select statement executed first or the group by statement executed first? Is the select statement executed first or the having clause executed first ?? Mysql> select (@ a: = empid) a, heyf_t10. *

Generally, this type of requirement is rare when you create tables dynamically in a mysql database. I have never met this before, but this project needs to be done. That is, the field names and number of fields in the table are not fixed and should

There are many related installation notes on the network for installing MySQL 5.5 notes under CentOS5.5, but they are not detailed, or the compilation environment is slightly different, the process will be different, therefore, I have summarized my

MySQL can obtain the ID of the current AUTO_INCREMENT to obtain the value of the newly generated AUTO_INCREMENT attribute. The recommended method is to use the LAST_INSERT_ID () function,That IS, use SELECT LAST_INSERT_ID () immediately after the

After a period of time, the MySQL-based Web site will often be in a status that cannot respond, or the response is very slow, because the database connection is automatically closed. Run show variables like '% timeout %' in MySQL Command Line Client'

Mysql order by operation performance problems in my notebook, run the following SQL code (a total of about 70 thousand rows of data, no index) select * from (SELECT nodeinfo. nodeID nodeid, nodeinfo. niid, nodeinfo. type, nodeinfo. testType testtype,

Run the show processlist command to view the mysql connection count. If the root account is used, you can view the current connections of all users. For other common accounts, you can only view the connections you are using. Www.2cto.com show

How to optimize MySQL insert performance for some systems with a large amount of data, in addition to low query efficiency, there is also a very important problem is the long insertion time. We have a business system. It takes 4-5 minutes to import

Problem description: my. ini file configuration in my mysql: www.2cto.com[Csharp] # Path to installation directory. all paths are usually resolved relative to this. basedir = "D:/software_builder/mysql/" # Path to the database root datadir = "C:

Mysql Import and Export includes functions or stored procedures 1. mysql exports the entire database mysqldump-h hostname-u username-p databasename> backupfile. SQL if the root user does not use the password, you can not write-p. Of course, you can

If InnoDB engine's independent tablespace innodb_file_per_table has been used by MySQL, the most frequently accessed table engine is MyISAM. the databases of this engine will create three files respectively: table Structure, table index, and table

In database management, files are commonly used to read data (import) from text files: CSV (Comma Separated Values) files. The Comma-Separated Values are as follows: www.2cto.com [plain] M0001, Li Gang, 1976-01-05,1 M0002, Wang Er, 1955-01-15,1 M0003

Mysql-related technical articles are frequently written recently when I write mysql technical articles or ppt documents to record cases in beautiful formats. There are three purposes: 1. Improve yourself; 2. Facilitate sharing; 3. documents for

What are the indexes and usage of mysql Databases? This article mainly describes how to accelerate MySQL Index Analysis and Optimization of dynamic websites. Www.2cto.com 1. What is an index? Indexes are used to quickly search for records with

I forgot the MySQL root password. I forgot the mysql password Based on Ubuntu 12.04 LTS. The solution found on the internet is recorded here. Edit the mysql configuration file/etc/mysql/my. cnf at www.2cto.com and add a line "skip-grant-tables"

MYSQL entry 7: MYSQL common functions links: MYSQL Entry 1: basic operations http://www.bkjia.com/database/201212/173868.htmlMYSQL Entry 2: Search Using Regular Expressions http://www.bkjia.com/database/201212/173869.htmlMYSQL Entry 3: Full Text

MYSQL Quick Start 9: simple indexing operations http://www.bkjia.com/database/201212/173868.htmlMYSQL Entry 2: Search Using Regular Expressions http://www.bkjia.com/database/201212/173869.htmlMYSQL Entry 3: Full Text Search

In actual development, you always encounter this situation.Www.2cto.com or when there is too much data in this case, it will make you crazy. If you still use select fields from table where like '/%', it is definitely a thankless approach, then,