MySQL

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Run a local script from mysql5 to create a database. The "data too long for column" error occurs when a Chinese field is inserted. I checked the Internet and found that most of the multibyte users encountered this situation. Most of the Solutions

Question: The table is as follows: Use only one SELECT statementQuery: average score (average score of all subjects) for students whose failing subjects are greater than or equal to 2 ). Mysql> select * from student; + ------ + ---------

When the JSP page is used to add Chinese data to the MySQL database, it is found to be garbled or garbled when reading Chinese data from mysql. The root cause of these problems is the inconsistency of character encoding. We need to know the source

MySQLIs a small relational database management system developed by SwedenMysqlabCompany, in2008Year1Month16IDSunAcquired by the company. CurrentlyMySQLAndSunTogetherOracleAcquisition (of course, due to EU intervention,OracleMay be considering how to

Slight comparison of char and varchar in MySQL In the MySQL database (other databases should be similar), and the two types can be set to the maximum degree when designing the database, one of their differences is that "the content stored as char

By referring to other articles 1.download and install mysql-5.5.30.tar.gzand cmake.2.8.11.2.tar.gz (1) install cmake first (after mysql5.5 is compiled through cmake) [root@ rhel5 local]#tar -zxv -f cmake-2.8.11.2.tar.gz[root@ rhel5 local]#cd cmake-2.

Document directory Remote connection operations MySQL disables the remote logon permission by default. The following operations allow users to log on to any location: 1. Enter MySQL GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY ''

1. Optimize Your query for the query Cache Query cache is enabled on most MySQL servers. This is one of the most effective ways to improve performance, and it is processed by the MySQL database engine. When many identical queries are executed

We always hope to avoid full table scanning by the database engine when doing some queries, because the full table scan takes a long time, and most of the scans do not make sense to the client. InMySQLWhich of the following methods can be used to

To configure MySQL ODBC, you must first install the MySQL ODBC driver. I installed mysql-connector-ODBC- 3.51.22 -Win32.msi, which can be: Http://mysql.cs.pu.edu.tw/Downloads/Connector-ODBC/3.51/mysql-connector-odbc-3.51.22-win32.msi You can

Document directory Incremental Backup Process Summary [Objective] Use mysqldump for full backup, and use the BINLOG function provided by MySQL to implement Incremental Backup For ease of operation, we recommend that you enable two terminal

Document directory Core Methods Requirements Query Analysis Create a two-dimensional array in jtable Add a two-dimensional array to the jtable Refresh results Core Methods select * from AAA where A like ‘%a%’ and B like '%b%' and C like '%

From: http://xiaofengtoo.iteye.com/category/57504? Show_full = true  1. Problem proposal When a third party needs to provide data synchronization updates for some tables, such as a platform system, and the upper-layer CRM system needs to provide

MySQL source code analysis series (1): Compilation and debugging For a long time, start from mysqld source code analysis. As I continue reading, I will write some articles to record my own experiences, but it is not guaranteed to be written. In fact,

From: http://blog.chinaunix.net/uid-7692530-id-2567549.html   1. sort by date only, ignore year> Select date, descriptionFrom table_name orderMonth (date), dayofmonth (date );Note: Using dayofyear alone will cause errors, such as the same

Alert usage summary: Alter database syntax Alter database is used to change the global features of a database. These features are stored in the DB. Opt file in the database directory. To use alterDatabase. You must obtain the alter permission for

MySQL optimized instance Wikipedia, a free encyclopedia In the architecture of Apache, PHP, and MySQL, MySQL has the greatest impact on performance and is also a key core component. For discuz! The same is true for Forum programs. Whether MySQL

Iii. Table type Many mysql users may be surprised that MySQL does provide users with 5 different table types, such as DBD, heap, isam, merge, and myiasm. DBD is classified as transaction security, while others are non-transaction security. 3.1.

MySQL 5.0 Stored Procedure 1. CreateStored Procedure1. Basic Syntax:  Create procedure sp_name () Begin ......... End 2. parameter transfer Ii. CallStored Procedure1. Basic Syntax: Call sp_name () Note: Stored ProcedureThe name must be enclosed in