MySQL

View IndexSHOW INDEX from database table nameFor example: SHOW INDEX from Order_info;Add indexALTER TABLE Database add index index name (database field name)Primary key IndexALTER TABLE ' table_name ' ADD PRIMARY KEY (' column ')For example: ALTER

Since Hive relies on Hadoop, you must confirm that Hadoop is available before installing hive, and the installation of Hadoop can refer to the cluster distributed Hadoop installation detailed steps, no longer described here.1. Download the Hive

Yum Install Httpd-yYum install MySQL Mysql-server-yYum install php-mysql php-pgsql php-pecl-mongo php-sqlite php-pecl-memcache php-pecl-memcached php-gd php-mbstring Php-mcrypt php-xml php-pecl-apc php-cli php-pear php-pdo-y--skip-brokenYum Install

1. A subquery refers to a SELECT clause in another query statement.Example:SELECT * from t1 WHERE column1 = (select Column1 from T2);Among them, SELECT * from T1 ... Called outer query[] (or outer Statement),SELECT Column1 from T2 is called Sub

1. Create a new userLog in to MySQL@>mysql-u root-p@> PasswordCreate usermysql> INSERT INTO Mysql.user (Host,user,password) VALUES (' localhost ', ' JEECN ', Password (' JEECN '));Refresh System Permissions TableMysql>flush privileges;This creates a

From chance to discover a MySQL feature to Wooyun WAF bypass problemmayikissyou | 2015-06-19 12:00At the time of the test, the occasional opportunity to discover a MySQL feature,Why is it a chance?During a test I did the following on the MySQL

Prepare the article:1, configure the firewall, open 80 ports, 3306 portsVi/etc/sysconfig/iptables-A input-m state–state new-m tcp-p tcp–dport 80-j ACCEPT #允许80端口通过防火墙-A input-m state–state new-m tcp-p tcp–dport 3306-j ACCEPT #允许3306端口通过防火墙Note: Many

When using the MySQL database, the new connection will be reported 2003-can ' t connect to server on ' localhost ' (10038) error, the main reason is that the MySQL service did not start up, but into: computer--management--services, Unable to find

As a DBA, careful, calm is the primary basic quality. However, there will always be a distraction or the development of the students in the wrong operation and so on ... This simulates a false update operation and then resumes.If the development of

Makefile.suffixes:. C. oCC=gccSRCs=mysql1.c MYDB.CObjs=$(SRCs:. c=.o)EXEC=mysql1All : $(Objs)$(CC)-O$(EXEC)$(Objs)-lmysqlclient@echo '-------------OK--------------'. C.o: $(CC) -Wall-g-o[email protected]-C$ Clean :Rm-f$(Objs) Rm-f core*Mydb.h

When we use MySQL may forget root password for a variety of reasons, if that is the case, the database may be discarded, but today to share the way to retrieve the root password, or if you do not know the root password to change the root password,

1. mysql executes the query plan, Key_len represents the number of bytes used by the index, and the number of bytes is related to three conditions.mysql> CREATE TABLE T1 (v1 char (10));Query OK, 0 rows affectedMysql> CREATE index INDEX_V1 on T1 (v1);

Zabbix official support for monitoring MySQL, but directly using the default template is not available, but also need to go through additional settings to use. If you only need to do a simple monitoring of the MySQL database, Zabbix the template can

Because the SAE PHP does not have file write permission, it uses MySQL to store data. Here are some simple notes to use.1, some constantsUser name: sae_mysql_user Password: sae_mysql_pass Main Library domain name: sae_mysql_host_m from the library

Visual VB6 less information, it took a long time to write a query statementFirst download the driver, I am win7 x64 do not know just started to download a 5.1 x64 driver why not connected, the total hint can not find the driver, download 5.3 32 bit

Reprint Please specify : Http://blog.csdn.net/uniquewonderq questions :1. New Financial account number: 2. Modify the information for a financial account. 3. Modify the status of a financial account. 4. Check all financial accounts. 5. Query

Reprint Please specify: HTTP://BLOG.CSDN.NET/UNIQUEWONDERQProblem: Use JDBC to connect to the database and realize the account transfer business. Transfer from a account to B account $500Scheme:In this case, in order to realize the transfer business,

1. Search for booksA. Requests can be made on the category, title, publisher, year (year range), author, price (interval). Each book information includes the following:(ISBN, category, title, publishing house, year, author, Price, total collection,

Log in to MySQL databaseMysql-u root-pDisplay (query) all databasesshow databases;Enter the databaseUse Dataname;Create a databaseCreate Database Dataname;/* DML: They are select, UPDATE, INSERT, DELETE, just like its name, these 4 commands are the

MySQL thread pool optimization I was summed up a webmaster's 3 articles, here I put it together this article is divided into three optimization sections, the following to see.MySQL thread pool series one (thread pool FAQ)First of all, what is MySQL