1.下载免安装版的压缩文件之后,解压至一个目录,如:D:\mysql\mysql56
2.在解压后的根目录下有一个my-default.int,复制此文件至别的目录,重命名为my.ini。
2.1. 修改my.ini文件,具体内容如下所示:
[client] port=3306 default-character-set=utf8 [mysqld] # These are commonly set, remove the # and set as required. basedir = D:\mysql\mysql56 datadir = D:\mysql\mysql56\data port = 3306 character_set_server=utf8 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES [WinMySQLAdmin] Server=D:\mysql\mysql56\bin\mysqld.exe
2.2.将此my.ini剪切后粘贴至mysql解压后的根目录下。
3. 配置环境变量:
3.1 MYSQL_HOME=D:\mysql\mysql56(解压缩后的根目录)
3.2 Path 后追加 ;%MYSQL_HOME%\bin
4. 从控制台cd到 mysql解压后的bin目录下后,把mysql安装成系统服务。
如4.1: C:\Users\Administrator>D:
4.2: D>D:\mysql\mysql56\bin
4.3: mysqld install MySQL --defaults-file="D:\Program Files\MySQL\mysql-5.6.13-win32\my.ini"
5. 启动mysql服务:net start mysql.
6. 修改mysql数据库服务器用户名:root 的密码
c:>mysql –uroot
mysql>use mysql;
mysql>UPDATE user SET password=PASSWORD("ganbare") WHERE user='root';
mysql>FLUSH PRIVILEGES;
mysql>QUIT

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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