MySQL

Download the second package, the WINDOWS32 bit is not installed (personally feel this bag clean). The current version is connector/c++ 1.0.5.Windows (x86, 32-bit), ZIP Archive (Mysql-connector-c++-noinstall-1.0.5-win32.zip) Extract the entire

The code is as follows Copy Code Session_Start ();$conn =mysql_connect (' localhost ', ' root ', ' root ') or Die (' Database connection error ');mysql_select_db (' demo ', $conn);mysql_query ("Set names ' GBK '");$US =$_session['

Class mysql{ Private $db _host; Database HostPrivate $db _user; Database user NamePrivate $db _pwd; Database PasswordPrivate $db _database; Database namePrivate $conn; database connection identification;Private $sql; Statements executed by

/*** Description, this class is suitable for small web site database backup, built-in MySQL connection, simply configure the data connection* and the location of the storage backup can be.* Class is materialized and you can connect to the database

Setting up MYSQL Data synchronization MySQL provides database replication functionality after version 3.23.15. The function of two database synchronization, master-slave mode and mutual backup mode can be realized by this feature. The settings for

Free Oversized php Tutorials/mysql Tutorials/ftp/Foreign no advertising personal spaceHosting at FreeWeb7.com Free does not necessarily mean bad hosting.That's why we offer the same features that are surprisingly big paid hosting companies offer.

unsigned is not a negative number, use this type can increase the length of the data! For example , if the tinyint max is 127, that tinyint unsigned max You can go to 127 * 2 The unsigned property is only for

I used one of these sql: The code is as follows Copy Code UPDATE ' student_quiz_answer ' SET ' article_id ' = (SELECT qa.article_id, sqa.answer_id from Student_quiz_answer SQA left JOI N ' Quiz_answer ' qa on

into Mysql:show full processlist; Command more sleep, the client over the connection is also normal, repeated execution of the above command to find the state of some command "coping to TMP table", decisively open my.cnf found no tmp_table_size

MySQL server has a function, you can detect which SQL statement query slow, that is, slow query Slowlog, now describes how to open.Add the following code under [Mysqld]: Long_query_time = 1Log-slow-queries =/usr/local/mysql/data/slow.logLog-queries-

SQL SELECT DISTINCT Statement Grammar: SELECT DISTINCT column name from table name using DISTINCT keyword If you want to select all the values from the company column, we need to use the SELECT statement: SELECT Company from Orders To select

When a lamp server I met suddenly crashed, the Web site opened: Table ' xxx ' is marked as crashed and should as repaired can be repaired directly with the MySQL command myisamchk: MySQL prompts tblname table is corrupted, need to fix, workaround:

Let's Make a concrete demo: 1, first we want to login phpMyAdmin (as the current mainstream development language), do not do demo. 2, create a database, the following figure, in phpMyAdmin (as the current mainstream development language) right

Operation Steps: Method One 1, installation P7zip: Because the source does not have this package, directly download the source code installation. Address: http://p7zip.sourceforge.net/ The code is as follows Copy Code

Error Handler ExamplesHere are some examples of handler declarations:If any error condition arises (other than a not FOUND), continue execution after setting L_error=1:DECLARE CONTINUE HANDLER for SQLEXCEPTIONSET l_error=1;If any error condition

MySQL Create Stored procedures"Pr_add" is a simple MySQL stored procedure that has two input parameters of type int "A", "B", returns the and of the two parameters. drop procedure if exists pr_add; --Calculate the sum of two numbers CREATE

Slow sql: Queries that run longer than a given time range are called slow queries. How do I record slow sql in MySQL? A: You can set the following information in MY.CNF: 1 [mysqld] 2; Enable the slow query log, default seconds 3

Do not use long when you can use short columns of data. If you have a fixed-length char data column, do not allow it to be longer than you really need. If you store the longest value in a data column with 40 characters, do not define char (255), but

The most common restart methodRestart apache:/etc/init. d/apache2 restart nowRestart mysql:/etc/init. d/mysql restart nowRecord several apach commandsApachectl-k graceful elegant restartApachectl-k restart nowApachectl-k graceful-stop elegantly

Problem DescriptionThe following error is reported when you use the official command (how to install) to install VestCP:To start mysqld at boot time you have to copySupport-files/mysql. server to the right place for your systemPlease remember to set