MySQL

BEGIN/*Calculate User Commission total amount*/DeclareAmountprice,pays,rates,goodsprice DECIMAL (10,2)DEFAULT0;DECLAREFlag int,getUserId;#if (userlevel=1) ThenSELECT member_id to getUserId from 33hao_member where OpenID=open_idDeclareCUR cursor

from:http://blog.csdn.net/wwwyuanliang10000/article/details/27536175Group_concat function in MySQLThe complete syntax is as follows:Group_concat ([DISTINCT] field to connect [order by Asc/desc sort field] [Separator ' delimiter '])Basic QueryMysql>

Prerequisite PreparationDo the test or the use of binary installation, simple and fast, in the original environment to install a good foundation.mysql-5.6.x binary version installation record http://koumm.blog.51cto.com/703525/1762167Individuals do

IntroductionThis article mainly from the view of the MySQL startup command code to learn more about the MySQL startup process, the content is more conceptual knowledge; Understanding the MySQL startup principle is essential to familiarize with MySQL,

1. View MySQL versionMethod one: status;Method Two: Select version ();2. mysql start, stop, restart common commandsA, starting mode1. Start with service:[[Email protected]/]# Service mysqld Start (5.0 version is mysqld)[[Email protected] etc]#

MVCC is the abbreviation for multiversion concurrency control, which provides no lock reading at the MySQL thing isolation level, such as a thing that does not affect the data read when it executes the update, such as SQL that does not commit when

SOLR is a high performance, JAVA5 developed, Lucene-based full-text Search server. At the same time, it is extended to provide a richer query language than Lucene, while it can be configured, extensible and optimized for query performance, and

1. View all the character sets supported by the databaseshow character set; or show char set;2. Check the current status including the character set settings of courseStatus or \s3. View the system character set settings, including all character set

Objective: Today a friend asked a question, the original text is as follows: Mysql5.1,myisam table, select COUNT (*) as total from m_bff WHERE from_uid= ' 73149293 ' and isdeleted=0. From_uid Index, the first time to execute this sentence slow,

In MySQL, if there is a one-to-many relationship between a piece of data and other data, it is natural for us to think of creating a relational table. For example, there is a data table of attraction information, which is structured as follows:

issue: Encounter MySQL startup prompt access denied for user [email protected] (using Password:yes)1, check the password there is no error, if none is a permission problem.2. Open the SQL Graphics tool and enter the following command lineGrant all

The world's 78,707 major cities information MySQL database, including latitude and longitude coordinate values, has been exported to the SQL file, because it is relatively large, there is 10M, so this is exported separately, for the upgrade failed

# # MySQL intercept function left (), right (), substring (), Substring_index ()SELECT left (' www.baidu.com ', 3); # wwwSELECT right (' www.baidu.com ', 3); # comSELECT SUBSTRING (' www.baidu.com ', 3); # w.baidu.comSELECT SUBSTRING ('

These two days in a database project, using MySQL, the need to remote access to MySQL through the external IP, found that the default MySQL is not allowed remote access, need to do a simple configuration.As follows:1. Open a terminal (CMD)

MySQL is a truly multi-threaded, multi-user SQL database service that, with its high performance, high reliability and ease of use, becomes the most popular open source database system in the server domain.A MySQL Compile and installIn order to

MySQL is the most popular relational database management system, and in Web applications MySQL is one of the best RDBMS (relational database Management system: relational databases Management systems) application software. Here's a summary of

The first two days with VS2013 connection MySQL encountered a lot of problems, the Internet search a lot of the discovery is not clear, so I would like to summarize the problems I encountered, to help Yimeimei less to go a little detour.Steps:1: The

Mysql zip install, mysqlinstall 1. Question Description: 1.1 version: mysql-5.7.11-64 1.2 form: zip file 1.3> mysqld -- install (successfully) 1.4 you create a directory called "data" in the mysql package, and create a file my. ini and edit the code

Preprocessing: EnglishPreprocessing Pre-processing (prepared) allows the DBMS to pre-compile the SQL statements that are repeatedly executed. Then, call the encoded SQL statement and pass the data. Step 2: Prepare for preprocessing Syntax:

[MySQL] highlights of Common Errors and Common commands[Background]When using the SQL Server database, you must have had experience solving various problems. In many cases, you may find problems and solutions in your blog. Currently, the MySQL