MySQL

Last night was good. An error was reported early this morning, which is annoying. [Root @ chinahealthreformmodel/] # ps-A | grep MySQL 9582 pts/1 00:00:00 mysqld_safe9693 pts/1 00:00:00 mysqld[Root @ chinahealthreformmodel/] # Kill-9 9582[Root @

I watched a video of PhP100 in the afternoon. It is also a bit rewarding. A self-written SQL function of findall in it: Public Function findall ($ table) { $ this-> query ("select * from $ table"); } It turned out to be so simple that I was

First look at the JSP file JavaProgramIs there request. setcharacterencoding ("UTF-8 ");The character encoding problem occurs. when the data is inserted into the database, the Java encoding is inconsistent with the database encoding. As a result,

Export the entire database from the MySQL database: 1. Export the entire database Mysqldump-u username-P Database Name> exported file name Mysqldump-u wcnc-P smgp_rj_wcnc> wcnc. SQL 2. Export a table Mysqldump-u user name-P database name Table

Yesterday I encountered a problem in the MySQL replication experiment: Database Version: 5.5.21-logOperating System: windows xp For master/slave replication, autocommit = 0 binlog-format = mixed tx-isolation = read-committed Experiment

Turn from the sky speed blog http://www.siutung.org/post/446/   During the upgrade of php5-extensions in FreeBSD, mysqli could not be compiled properly, error prompt:=> Building for

[From] http://www.blogjava.net/hh-lux/archive/2007/05/05/115419.html   1. Export the entire database Mysqldump-u username-p Database Name> exported file name Mysqldump-u wcnc-p smgp_rj_wcnc> wcnc. SQL 2. Export a table Mysqldump-u user

[From] http://tech.ccidnet.com/art/1105/20041104/173233_1.html   After learning some basic operation commands, let's learn how to create a database and a database table. 1. Use the show statement to find out the current database on the server:  

A complete mysql read/write splitting environment consists of the following parts: Application Client Database proxy Database Cluster In this practice, the application client connects to the back-end database proxy Based on c3p0. Database proxy

Download: wget http://sourceforge.net/projects/mysql-python/files/latest/downloa Cd/root/MySQL-python-1.2.4b4 Tar-zxvf MySQL-python-1.2.4b4.tar.gz # Vi site. cfg Embedded = FalseThreadsafe = TrueStatic = False Mysql_config

The front-end time is related to a DB project. alanc reports a query. Using indexes is much slower than not using indexes. So I followed up and used explain to look at two different query results. The results of queries without indexes are as

SUBSTRING_INDEX (str, delim, count) mysql> SELECT SUBSTRING_INDEX ('www .mysql.com ','. ', 2);->' www. mysql 'mysql> SELECT SUBSTRING_INDEX ('www .mysql.com ','. ',-2);->' mysql. the usage of the following SQL statement is reprinted: The results of

Install mysql in linux suse enterprise 10 and download the rpm package of the corresponding version from the mysql official website (now oracle ). Http://www.mysql.com/downloads/mysql/#downloads After the installation is complete, rpm-qa can see

I wrote a program yesterday and needed to write a database. I called MySQL's c API. A link error occurred during compilation: /Usr/lib/MySQL/libmysqlclient. A (SSL. O) :(. GNU. linkonce. D. _ vt_q25yassl7message + 0x8): Undefined reference to '_

MySQL variable usage Summary Learning set statements: Use select to define user VariablesChange the following statement to select:Set @ Var = (select sum (amount) from penalties );My modifications:Select @ var: = (select sum (amount) from penalties )

Show variables like '% character %' After logging on to mysql by default in LinuxMysql> show variables like '% character % ';------------------------------------------------------| Variable_name | Value |Modify/etc/mysql/my. cnfAdd default-character-

Drop table if exists Article; Drop table if exists Board; Drop table if exists User; /* ===================================================== ======================================= *//* Table: Article *//* ===========================================

Document directory 1 Preface remarks 2. Install mysql5 3. Install nginx Installing Nginx + MySQL + PHP5 (PHP-FPM mode) LNMP in Fedora 14 20:17:40 | category: Fedora | Tag: php nginx mysql root html | large font size, small/medium

1. To optimize the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order.2. Try to avoid null value determination on the field in the where clause. Otherwise, the engine will discard

We know that BDB is an embedded database with a higher access efficiency than mysql, but it is not convenient to manage mysql. synchronization is also a problem in distributed applications. Mysql supports the use of BDB as the storage engine (which