MySQL

CopyCodeThe Code is as follows: repair table 'table _ name' to repair the table Optimize table 'table _ name' optimize table Repair table is used to repair damaged tables.Optimize table is used to recycle idle database space. When the data rows in

You can set the value of the date. timezone key to 'Asia/Shanghai' in the urban configuration of the PHP script in PHP. ini. However, the shared VM itself does not have the permission to modify PHP. ini. At this time Program Add public part Ini_

Information error information is as follows: Try to create a database named test7i24 with a password of 123456: The command is successfully executed. The command is successfully executed. Operation error, related information: [MySQL] [ODBC 3.51

Prepare the software first: 1. install Apache. A common website server is successfully configured. Run the downloaded "apache_2.0.55-win32-x86-no_ssl.msi", the following interface appears: On the Installation Wizard Page of Apache HTTP

# Begin config info # Descr: 4 gb ram, only InnoDB, acid, a small number of connections, large queue Load # Type: System # End config info # # This MySQL configuration file example is for 4G memory and is downloaded from www.bt285.cn Bt and tested

You can test the database test, table bintest, and data field data type by using longblob in the middle line of the DBMS. // Test file c: \ test. ISO. You can find any file and change it. Program , Changed to test. ISO. // The maximum size of Files

Mysql slow query logs are very useful for queries with tracing problems. We can analyze the resource-consuming SQL statements in the current program. How can we open mysql slow query log records? In fact, it is very easy to open the slow query log

Text/figure security angel [BST] Preface My "SQL Injection with MySQL" (the special topic of "" in July) has provided a comprehensive introduction to MySQL Injection, but there is a function that harms a lot, I didn't mention it in this article,

Compared with the replication of NoSQL databases such as MongoDB and Redis, MySQL replication is quite complex! OverviewFirst, the master server records data changes to the master log, then reads the master log on the master server from the server

(1) LinuxRun the following command in SSH to reset the MySQL password to diavps.Copy codeThe Code is as follows:Rm-f reset-mysql-root-password.phpsWget http://down.hostwiki.info/mysql/reset-mysql-root-password.phpsPhp reset-mysql-root-password.phps (

Copy codeThe Code is as follows:INSERT table (auto_id, auto_name) values (1, 'yourname') on duplicate key update auto_name = 'yourname'ON DUPLICATE KEY UPDATEIf you specify on duplicate key update and insert a row, DUPLICATE values will appear in a

These problems may change the data value. In general, the above problem may occur when you use non-binary string data types (such as char, varchar, text, and other data types. AES_ENCRYPT () and AES_DECRYPT () AES_ENCRYPT () and AES_DECRYPT ()

Several criteria for creating an index: 1. Reasonable indexing can accelerate data reading efficiency. improper indexing slows down the response speed of the database. 2. The more indexes, the slower the data update speed. 3. Try to use indexes when

MySQL string functionsFor operations on the string position, the first position is marked as 1.ASCII (str) Returns the ASCII code value of the leftmost character of the str string. If str is a Null String, 0 is returned. If 'str' is NULL, return

First of all, we should note that the daily access volume is not as large as of the daily access volume. In principle, a doubling of the access volume should also be sufficient for such servers. But why does our Server Always restart frequently?

If MySQL 5.0.x is usedYou can directly Save the following content and replace my. ini in MySQL. Remember to modify the path of the basedir and datadir columns.Copy codeThe Code is as follows:[Client]Port = 3306[Mysql]Default-character-set =

At the beginning of the year, I had been working on the migration of a website MSSQL2000-> MySQL5. Because different program systems were used, the main problem was data migration. Because the structure of the two System databases is very different,

Thanks for the Code provided by XP!Record it here, because it will be used later. It will be used for data query!Step 1: mysql-h localhost-urootStep 2: show databases;Step 3: use changchunmap;Step 4: show tables;Step 5: load data local infile

Traditional relational databases are generally composed of three levels: database, table, and record,MongoDB is composed of three layers: database, collection, and document.. MongoDB has no concept of columns, rows, and links for tables in

MySQL provides standard SQL mode matching and an extended regular expression mode matching format based on Unix utilities such as vi, grep, and sed.I. SQL Mode SQL pattern matching allows you to use "_" to match any single character, while "%"