MySQL

Original: MySQL Advanced stored procedureConcepts similar to functions,is to encapsulate a piece of code.,when it comes to executing this piece of code,,You can call this stored procedure to implement the.inside the encapsulated statement body,can

Original: MySQL Advanced triggerA trigger is a special kind of transaction that can monitor a data operation (Insert/update/delete) and trigger related actions (Insert/update/delete).Look at the following events:The logic of completing orders and

Table "CREATE TABLE ' goods ' (' id ' int (one) not NULL auto_increment,' Name ' varchar (not NULL COMMENT '?? '),' Dateline ' int (ten) is not NULL,PRIMARY KEY (' id ')) Engine=myisam auto_increment=2451249 DEFAULT Charset=utf8Test the environment

Demo1Connection connection=NULL; Statement stmt=NULL; intResult=-1; Try{class.forname ("Com.mysql.jdbc.Driver"); } Catch(ClassNotFoundException e) {e.printstacktrace (); } Try { //Create a connectionString url=

before the SQL script executes, add:CREATE DATABASE IF not EXISTS mydatabase DEFAULT CHARSET UTF8 COLLATE utf8_general_ci;Use broadleaf; Replace the table code in the original backup:Engine=myisam DEFAULT charset=latin1globally replaced

Recently, I learned Python, recorded the code and experience of writing to learn Python, wrote a query statement using Python MySQL and made a db_config.py configuration information.1. db_config.py configuration file1 #/usr/bin/python2 3

/** * Download Voice * Remarks: * @throws Exception */public void Downloadyuyin () throws Exception {String Voiceid = Getrequest (). GetParameter ("Voiceid");InputStream InputStream = Voiceservice.findinputbyvoiceid (Voiceid);String realPath1 =

First in the new database must pay attention to generate the original database the same encoding form, if it has been generated can be used phpMyAdmin and other tools to organize again, to prevent the database encoding and table encoding is not

MySQL 5.6 for timeout parametersMysql> show global variables like '%timeout% ';+-----------------------------+----------+| variable_name | Value |+-----------------------------+----------+| Connect_timeout | 1000 || Delayed_insert_timeout | 300 ||

PROFTPD +mysql+ssl, unable to successfully compile Mod_sql mod_sql_mysql module, intranet Yum according to the MySQL external network source installed MySQL, are not, or look at the official

Import mysqldb//define driver files for reference databasesImport serialImport timeSer = serial. Serial ('/dev/ttyath0 ', 115200, timeout=65)//Read serialWhile True:data = Ser.readline ()Print repr (data)//output ReadConn=mysqldb.connect (host= ' 192

At the beginning of the study, Baidu to check, but found a lot of said too complex and difficult to understand, combined with each article summed up (suggest probably read the text, do not understand it does not matter, then look at the diagram of

What is a cursor? The SELECT statement may fetch an n statement at a time, so the cursor can take out a record in the select one of these. Every time you take out one, move it down! Can implement very complex logic!There is one more problem, will

1. About Query Caching Take a look at 2 examples directly:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/4C/C1/wKioL1RE1_aQWzaqAAC-tRq76Ak323.jpg "title=" Mysql13.png "alt=" Wkiol1re1_aqwzaqaac-trq76ak323.jpg "/>650) this.

The following is a detailed description of the use of MySQL ifnull function, for your reference to learn, if you have encountered similar problems in MySQL ifnull function use, may wish to see.MYSQL ifnull (EXPR1,EXPR2)If EXPR1 is not Null,ifnull ()

First, backupmysqldump [OPTIONS] database [tables]Http://www.blogjava.net/Alpha/archive/2007/08/10/135694.html1. Export the entire databaseMysqldump-u user name-p database name > exported file nameMysqldump-u wcnc-p SMGP_APPS_WCNC > Wcnc.sql2.

MySQL Backup and Bin-log logsBackup data: Mysqldimp-uroot-p test-l-F '/tmp/test.sql '-L Read lock-F that is flush logs, you can regenerate the log files, including, of course, log-bin logs.View Bin-log logs with mysql>show master status;Clear table

The home computer uses the Linux operating system, the recently collected data needs to be stored to MySQL, originally uses the web.py the time to use the MySQL is all normal, results now directly uses the MYSQLDB to connect the database the

MySQL series: Memory Management for innodb Engine Analysis Innodb implements its own memory pool system and memory heap allocation system. In the innodb memory management system, there are roughly three parts: basic memory block allocation

MySQL series: Basic Data Structure of innodb Engine Analysis Over the past year, I have been analyzing database-related source code. Some time ago I analyzed the implementation of levelDB and BeansDB. There are many articles on the network analysis