今天领导要求使用免编译的方式安装生产环境的mysql,所以才有了下文. 里面涉及的目录已经处理,大家根据需要自己来改吧! 1 下载
今天领导要求使用免编译的方式安装生产环境的mysql,所以才有了下文. 里面涉及的目录已经处理,大家根据需要自己来改吧!
1 下载mysql免编译包:
1 wget
2 设置mysql目录:
tar -zxvf mysql-5.6.14-linux-glibc2.5-x86_64.tar.gz
mv mysql-5.6.14-linux-glibc2.5-x86_64 /usr/local/mysql
groupadd mysql
useradd -g mysql -M mysql
mkdir -p /work/mysql/data
chown -R mysql.mysql /work/mysql/data
3 初始化MySQL数据库:
#提示:运行下面的命令初始化安装mysql之前确认系统没有/etc/my.cnf
/usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql --datadir=/work/mysql/data --user=mysql
4 添加mysqld 成为系统服务并设置自启动:
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig mysqld on
5 启动mysql:
/etc/init.d/mysqld start
6 设置密码:
/usr/local/mysql/bin/mysqladmin -u root password '你的密码'
7 关于my.cnf:
mysqld-5.5以上版本的my.cnf这个文件 在执行初始化的时候,,会自动安装到/usr/local/mysql/my.cnf下。 并且主要修改里面的选项配置
8 故障:
Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
解决办法:
这个问题是需要重新初始化mysql数据库
mysql_install_db --basedir=/usr/local/mysql --datadir=/work/mysql/data --user=mysql
9 关于我的my.cnf:
/usr/local/mysql/my.cnf
# For advice on how to change settings please see
#
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /work/mysql/data
port = 3306
# server_id = .....
socket = /tmp/mysql.sock
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
ps : 根据上面的内容可以自己做成一键安装脚本。这样就不必像以前那样漫长的等待了.
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MySQL functions can be used for data processing and calculation. 1. Basic usage includes string processing, date calculation and mathematical operations. 2. Advanced usage involves combining multiple functions to implement complex operations. 3. Performance optimization requires avoiding the use of functions in the WHERE clause and using GROUPBY and temporary tables.

Efficient methods for batch inserting data in MySQL include: 1. Using INSERTINTO...VALUES syntax, 2. Using LOADDATAINFILE command, 3. Using transaction processing, 4. Adjust batch size, 5. Disable indexing, 6. Using INSERTIGNORE or INSERT...ONDUPLICATEKEYUPDATE, these methods can significantly improve database operation efficiency.

In MySQL, add fields using ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column, delete fields using ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop. When adding fields, you need to specify a location to optimize query performance and data structure; before deleting fields, you need to confirm that the operation is irreversible; modifying table structure using online DDL, backup data, test environment, and low-load time periods is performance optimization and best practice.

Use the EXPLAIN command to analyze the execution plan of MySQL queries. 1. The EXPLAIN command displays the execution plan of the query to help find performance bottlenecks. 2. The execution plan includes fields such as id, select_type, table, type, possible_keys, key, key_len, ref, rows and Extra. 3. According to the execution plan, you can optimize queries by adding indexes, avoiding full table scans, optimizing JOIN operations, and using overlay indexes.

Subqueries can improve the efficiency of MySQL query. 1) Subquery simplifies complex query logic, such as filtering data and calculating aggregated values. 2) MySQL optimizer may convert subqueries to JOIN operations to improve performance. 3) Using EXISTS instead of IN can avoid multiple rows returning errors. 4) Optimization strategies include avoiding related subqueries, using EXISTS, index optimization, and avoiding subquery nesting.

Methods for configuring character sets and collations in MySQL include: 1. Setting the character sets and collations at the server level: SETNAMES'utf8'; SETCHARACTERSETutf8; SETCOLLATION_CONNECTION='utf8_general_ci'; 2. Create a database that uses specific character sets and collations: CREATEDATABASEexample_dbCHARACTERSETutf8COLLATEutf8_general_ci; 3. Specify character sets and collations when creating a table: CREATETABLEexample_table(idINT

To safely and thoroughly uninstall MySQL and clean all residual files, follow the following steps: 1. Stop MySQL service; 2. Uninstall MySQL packages; 3. Clean configuration files and data directories; 4. Verify that the uninstallation is thorough.

Renaming a database in MySQL requires indirect methods. The steps are as follows: 1. Create a new database; 2. Use mysqldump to export the old database; 3. Import the data into the new database; 4. Delete the old database.


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