1、软件环境:CentOS 6.5 x64MariaDB 5.5.36 2、安装过程1)在/etc/yum.repos.d/目录创建MariaDB.repo文件,内容如下: # MariaD
1、软件环境:
CentOS 6.5 x64
MariaDB 5.5.36
2、安装过程
1)在/etc/yum.repos.d/目录创建MariaDB.repo文件,内容如下:
# MariaDB 5.5 CentOS repository list - created 2014-03-04 11:20 UTC
#
[mariadb]
name = MariaDB
baseurl =
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
2)在Shell环境下执行命令
# yum install MariaDB-server MariaDB-client
Loaded plugins: fastestmirror, security
base | 3.7 kB 00:00
base/primary_db | 4.4 MB 01:11
extras | 3.4 kB 00:00
extras/primary_db | 19 kB 00:00
mariadb | 1.9 kB 00:00
mariadb/primary_db | 15 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 2.1 MB 00:22
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package MariaDB-client.x86_64 0:5.5.36-1.el6 will be obsoleting
--> Processing Dependency: MariaDB-common for package: MariaDB-client-5.5.36-1.el6.x86_64
---> Package MariaDB-server.x86_64 0:5.5.36-1.el6 will be obsoleting
---> Package mysql.x86_64 0:5.1.71-1.el6 will be obsoleted
---> Package mysql-server.x86_64 0:5.1.71-1.el6 will be obsoleted
--> Running transaction check
---> Package MariaDB-common.x86_64 0:5.5.36-1.el6 will be installed
--> Processing Dependency: MariaDB-compat for package: MariaDB-common-5.5.36-1.el6.x86_64
--> Running transaction check
---> Package MariaDB-compat.x86_64 0:5.5.36-1.el6 will be obsoleting
---> Package mysql-libs.x86_64 0:5.1.71-1.el6 will be obsoleted
--> Finished Dependency Resolution
Dependencies Resolved
==================================================================================================================
Package Arch Version Repository Size
==================================================================================================================
Installing:
MariaDB-client x86_64 5.5.36-1.el6 mariadb 10 M
replacing mysql.x86_64 5.1.71-1.el6
MariaDB-compat x86_64 5.5.36-1.el6 mariadb 2.7 M
replacing mysql-libs.x86_64 5.1.71-1.el6
MariaDB-server x86_64 5.5.36-1.el6 mariadb 42 M
replacing mysql-server.x86_64 5.1.71-1.el6
Installing for dependencies:
MariaDB-common x86_64 5.5.36-1.el6 mariadb 23 k
Transaction Summary
==================================================================================================================
Install 4 Package(s)

MySQLdiffersfromotherSQLdialectsinsyntaxforLIMIT,auto-increment,stringcomparison,subqueries,andperformanceanalysis.1)MySQLusesLIMIT,whileSQLServerusesTOPandOracleusesROWNUM.2)MySQL'sAUTO_INCREMENTcontrastswithPostgreSQL'sSERIALandOracle'ssequenceandt

MySQL partitioning improves performance and simplifies maintenance. 1) Divide large tables into small pieces by specific criteria (such as date ranges), 2) physically divide data into independent files, 3) MySQL can focus on related partitions when querying, 4) Query optimizer can skip unrelated partitions, 5) Choosing the right partition strategy and maintaining it regularly is key.

How to grant and revoke permissions in MySQL? 1. Use the GRANT statement to grant permissions, such as GRANTALLPRIVILEGESONdatabase_name.TO'username'@'host'; 2. Use the REVOKE statement to revoke permissions, such as REVOKEALLPRIVILEGESONdatabase_name.FROM'username'@'host' to ensure timely communication of permission changes.

InnoDB is suitable for applications that require transaction support and high concurrency, while MyISAM is suitable for applications that require more reads and less writes. 1.InnoDB supports transaction and bank-level locks, suitable for e-commerce and banking systems. 2.MyISAM provides fast read and indexing, suitable for blogging and content management systems.

There are four main JOIN types in MySQL: INNERJOIN, LEFTJOIN, RIGHTJOIN and FULLOUTERJOIN. 1.INNERJOIN returns all rows in the two tables that meet the JOIN conditions. 2.LEFTJOIN returns all rows in the left table, even if there are no matching rows in the right table. 3. RIGHTJOIN is contrary to LEFTJOIN and returns all rows in the right table. 4.FULLOUTERJOIN returns all rows in the two tables that meet or do not meet JOIN conditions.

MySQLoffersvariousstorageengines,eachsuitedfordifferentusecases:1)InnoDBisidealforapplicationsneedingACIDcomplianceandhighconcurrency,supportingtransactionsandforeignkeys.2)MyISAMisbestforread-heavyworkloads,lackingtransactionsupport.3)Memoryengineis

Common security vulnerabilities in MySQL include SQL injection, weak passwords, improper permission configuration, and unupdated software. 1. SQL injection can be prevented by using preprocessing statements. 2. Weak passwords can be avoided by forcibly using strong password strategies. 3. Improper permission configuration can be resolved through regular review and adjustment of user permissions. 4. Unupdated software can be patched by regularly checking and updating the MySQL version.

Identifying slow queries in MySQL can be achieved by enabling slow query logs and setting thresholds. 1. Enable slow query logs and set thresholds. 2. View and analyze slow query log files, and use tools such as mysqldumpslow or pt-query-digest for in-depth analysis. 3. Optimizing slow queries can be achieved through index optimization, query rewriting and avoiding the use of SELECT*.


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