MySQL

After finishing the Html5 Web App page of a mobile client strategy, new requirements emerged: because the strategy articles are crawled, there are many external links that were not filtered at the beginning. So I first wrote a filter function in PHP,

My friend asked: 50 million how to deduplicate a table with data and determine whether the table is repeated based on the two fields. Reply: Select two fields and the primary key id to create a temporary table t1, T1 is used to establish a

REPLACE runs like INSERT. There is only one exception. Assume that an old record in the table and a record used for PRIMARY If the new record of a KEY or UNIQUE index has the same value, the old record is deleted before the new record is

The reason why Mysql can synchronize between master and slave servers is that the events (events) on the master server are written to the binary log, and then these events are executed again on the slave server. Events are written to BINLOG in the

MySQL query High-Speed Buffer The query cache stores the SELECT query text and the corresponding results sent to the client. If the same query is received subsequently, the server returns the query result from the query cache, instead of parsing and

1. Download the installation package Mysql5.6: Http://dev.mysql.com/downloads/mysql/ Select the linux version here:   Navicat11 cracked version: Http://download.csdn.net/detail/can007/69714752 mysql Installation Download the rpm64-bit installation

Create view 'v _ noprovide 'as select * FROMtb_sectionWHEREprovide = '0' create view 'v _ thismonth' AS SELECTts. userId AS id, CONCAT ('thismonth: ', SUM (ts. amount), 'yuanyuan ') AS 'thismonth' FROMtb _ section AS tsWHEREts. yearMonth =

TRUNCATE [TABLE] tbl_name Truncate table is used to completely empty a TABLE. Logically, this statement is equivalent to the DELETE statement used to DELETE all rows, but in some cases, the two are used differently. For an InnoDB TABLE, if there is

1. decompress the package to the custom directory. Mine is E: \ MySQL. 2. environment variable configuration MYSQL_HOME E: \ MySQL (your extract directory) % MYSQL_HOME % \ bin is added to path; 3. Find C: \ Windows \ System32 \ cmd.exe, right-click

Use the procedure analyse function to optimize the table data type.The data type used by the table depends on the application. In MySQL, you can use the procedure analyse () function to analyze the current application table. This function can

If you have installed mysql before, uninstall it and delete the "windows Service" corresponding to mysql by running the "SC delete mysql" command. Mysql installation

MySQL Advanced Operations (I) I. MySQL table replication Create table t2 like t1; # copy the table structure. t2 can learn all the table structures of t1. Insert into t2 select * from t1; # copy table data, but this still has a defect, because the

Since the machine has orcale and does not want to install mysql again, there will be a free installation, and it will take a little effort to complete the competition! 1. Download a version without Installation I put in Baidu network disk, here can

When you use a client or other methods to connect to data and type Chinese data, garbled characters are displayed in the client. Of course, this is a problem with character set settings. I tried many methods, but still cannot display Chinese in the

After one night of hard work, the installation was successful: The information collected on the Internet mainly includes the following two aspects: First aspect: MySQL5.6.13 installation procedure (64-bit Windows 7)1. Download MySQL Community Server

Maybe many people may encounter such problems when using the mysql database like me. They cannot display Chinese characters and cannot be loaded into the database. This is the character encoding problem that programmers will encounter. Next we will

The entire process is divided into three steps: 1. Write the Stored Procedure 2. Write Event Events 3. Set the Event to Enable and open the Event task. 1. Stored Procedure First define a stored procedure, del_data. Input an int parameter is the

1. Function Introduction FIND_IN_SET (Str,Strlist) Assume that the stringStrInNString list composed of substringsStrlist, The returned value range is 1N. A string list is a string consisting of several tokens separated by commas. If the first

Recently, the open source database company Ingres Database released the development environment installation package-EasyIngres. This community project makes the use and installation of the Ingres PHP development environment more convenient and fast,

19.3 install Smarty Installing Smarty is very simple. First, download the latest stable version at http://smarty.php.net. Run the following command to install Smarty. (1) decompress the package to a location outside the root directory of the Web