MySQL

Although PHP provides a lot of functions for us, it is not easy to process some things. For example, the date and time functions provided by PHP are very limited. MySQL provides us with many such functions. Can I use MySQL functions to process PHP?

Match ASP with MySQL Required tools Mysql-4.1.11-win32Myodbc-3.51.11-1-dllMyodbc-3.51.11-1-winMysqlcc-0.9.4-win32 ------------------------------------------------------------------- Register the file mydbc. Reg Regedit4

// This page is "say. php" Include "signup/MySQL. Inc "; If ($ id1 ){ $ SQL = "select * from $ table where id = '$ id1'"; // a reply question is displayed. $ Result = mysql_query ($ SQL) or die (mysql_error ()); $ ROW = mysql_fetch_array ($ result );

The ORACLE tutorial is: MySQL security guide (1) (). MySQL Security Guide Author: Yan Zi As a MySQL System Administrator, you have the responsibility to maintain the data security and integrity of your MySQL database system. This article mainly

The ORACLE tutorial is: MySQL Security Guide (3) (go ). MySQL Security Guide (3) Author: Yan Zi 2.4 set users without GRANTIf you have a MySQL version earlier than 3.22.11, you cannot use the GRANT (or REVOKE) statement to set user and access

I plan to switch the host of a website. I did not expect to encounter Chinese garbled characters in Php and Mysql. In the past, Mysql for foreign hosts was 4. x series, I feel better, no matter GBK and UTF-8 are not garbled, did not expect the

MySQL is "the most popular open database in the world", at least for MySQL Web sites. However, no matter how popular MySQL is, many companies are resistant to MySQL usage. This phenomenon comes from several reasons, some of which mistakenly think

The following query Selects all records whose date_col values are within the last 30 days.Mysql> SELECT something FROM tbl_nameWHERE TO_DAYS (NOW ()-TO_DAYS (date_col) DAYOFWEEK (date)Returns the week index of date (1 = Sunday, 2 = Monday,... 7 =

Yesterday it was configured for a day, its configuration is Jena 2.4.0, MySQL database version is 5.1.42-community, JDK version is 1.6.0, MySQLdriver is mysql-connector-java-3.1.14;An example is written according to the resources on the network, and

Copy codeThe Code is as follows:List ($ usec, $ sec) = explode ('', microtime ());$ Timer = (float) $ usec + (float) $ sec;Mysql_query ($ query, $ active_db );List ($ usec, $ sec) = explode ('', microtime ());$ Stop = (float) $ usec + (float) $ sec;$

The following articles mainly introduce the practical use of MySQL ALTER syntax. We all know that the proportion of MySQL ALTER syntax in actual application is still very large, so you can have a good idea about the practical use of MySQL ALTER

The following articles mainly describe how to implement simple and practical MySQL database optimization methods, including how to regularly analyze and check tables and how to optimize tables on a regular basis, the following is a description of

I. Environment OS: Linux myhostname 2.6.9-42. ELsmp #1 SMP Sat Aug 12 09:39:11 CDT 2006 i686 i686 i386 GNU/LinuxCentOS release 4.4 (Final)Oracle: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Prod, the Database has been installedMysql: 5.

Create database mytest default charset = utf8 // create a databaseCreate table users // create a table(User_id int not null auto_increment,User_name varchar (20) not null,Description varchar (200 ),Primary key PK_userid (user_id));Show create table

Assume that the following N records indicate bookId author title1 aaa AAA2 bbb BBB3 ccc4 ddd5 eee AAANow I want to query all records with no duplicate titles from these five records.Select distinct title, author from book is not allowed because

Back up old dataStop old ServerDelete the mysql service from the windows System Service and run the following command:C: \> C: \ mysql \ bin \ mysqld -- remove install mysql using an executable installation file, or decompress a binary compressed

Copy codeThe Code is as follows:#! /Bin/kshINTERVAL = 5PREFIX = $ INTERVAL-sec-statusTouch/tmp/runningRUNFILE =/tmp/runningMy-e 'show global variables '> mysql-variablesWhile test-e $ RUNFILE; doFile = $ (date + % F _ % I)Sleep = $ (date + % s. % N |

Where condition expression-- Statistical functionsCopy codeThe Code is as follows:Select count (1) from student;-- Like fuzzy query-- Count the number of people surnamed Zhang in the classCopy codeThe Code is as follows:Select count (*) from student

When you first install MySQL on a machine, the authorization table in the mysql database is initialized as follows: You can connect to the local host as a root without specifying a password. Root users have all permissions (including management

1GROUP_CONCAT Mysql>SELECT student_name,->GROUP_CONCAT (test_score)->FROM student->Group by student_name; Or: Mysql>SELECT student_name,->GROUP_CONCAT (DISTINCT test_score->Order by test_score desc separator '')->FROM student->Group by student_name;