MySQL

Query Mysql status # Query database connection show full processlist; show status like '% Max_used_connections %'; show status like '% Threads_connected %'; # current connections show status like '% table_lock % '; # Table lock show status like

Mysql database IntroductionMySQL is a real multi-user, multi-thread SQL database server. SQL (Structured Query Language) is the most popular and standard in the world.Database language. MySQL is implemented in a Client/Server structure. It is

Use SQLyog to analyze the MySQL database: SOLyog is easy to download, install, and use. I went to the relevant website to download it. It is only kb in size. Install two files (one Executable File .exe and one dynamic link library file. dll) to the

Case sensitivity when executing the SEARCH Command By default, MySQL does not distinguish uppercase and lowercase letters when performing search. When you use like a % during search, all column values starting with a or A are returned by default. To

I don't know how many people know clearly. in Oracle, if a composite index is used, assume that one of the three fields of the index (a, B, c) is deleted (including unused, how Does Oracle handle this index. Similarly, what should Oracle do if it is

When using mysql, you sometimes need to query records with unique fields. Although mysql provides the keyword distinct to filter out redundant duplicate records, only one record is retained, but it is often used to return the number of records that

Assume that mysql is installed on the c: disk, the mysql database username is root, the password is 123456, the database name is database_name, And the backup database is stored under the d: disk root directory, the backup database name is backup2007

SteevenIt seems that there are very few people discussing paging. Are everyone addicted to limit m, n?In the case of indexing, the limit m, n speed is enough, but in the case of complex search conditions,Where somthing order by somefield +

Abstract: This article describes how to modify a user's PASSWORD. You can use three methods: GRANT statement, set password statement, directly modify the authorization table, and use the management tool mysqladmin. An important application is how to

Original article: New Features of MySQL 6.0 New Features of MySQL 6.0Note: Because MySQL 6.0 is still in its early stages, the content here will change. The following functions have been or are to be added to MySQL 6.0: * The New Falcon transaction

If you run the table check/repair program at the same time, you may not want the MySQL server and utility to access a table at the same time. If both programs write data to the table, it will obviously cause a lot of trouble and even cause

Because mysql_real_escape_string requires MySQL database connection, you must connect to the MySQL database before calling mysql_real_escape_string. PHP:Function mysqlClean ($ data){Return (is_array ($ data ))? Array_map (mysqlClean, $ data):

By default, Mysql cannot be accessed through a remote machine. You can enable remote access through the following configuration. My Mysql environment is ubuntu + mysql5 1. Modify/etc/mysql/my. conf, bind-address, and specify as the actual IP

Mysql limit usage: When we use a query statement, we often need to return the first few or a few rows of data. What should we do at this time? Don't worry, mysql already provides us with such a function. SELECT * FROM table LIMIT

(1) Connection The connection usually comes from the Web server. The following lists some connection-related parameters and how to set them. 1. max_connections This is the maximum number of connections allowed by the Web server. Remember to use the

1. Check whether you should use a MySQL cluster. Reduce the pressure on the data center nodes and process large data volumes. MySQL is distributed and one or more applications correspond to one MySQL database. Share data with the common data of

Use mysqldump and source  You can use this method to export data:Mysqldump-urott-P5678 -- default-character-set = gb2312-p-h127.0.0.1 Test test1> test1. SQLYou can also do this:Mysql-uroot-P5678 -- default-character-set = gb2312-p-h127.0.0.1-e

After WAMP is installed, the mysql password is empty. How can I modify it? In fact, it is very simple. Just run a few commands. Next I will perform the operations step by step. First, open the mysql console through WAMP.   Prompt to enter the

  Recently, I have been busy developing business systems, and the database has been replaced with Mysql from the original Oracle database. However, I found that SQL Execution was very slow during online operation, what's more strange is that this

Server:Host 192.168.1.101Port 3306Server B:Host 192.168.1.102Port 3306 1. Authorized users:ServerMysql> grant replication slave, file on *. * to 'repl9' @ '192. 168.1.102 'identified by '20140901 ';Query OK, 0 rows affected (0.01 sec)Mysql> flush