我的虚拟机是virtualbox,安装的linux是OracleLinuxServer6.4。 主机是windows2003,现在想在windows2003上访问虚拟机的linux里面安装的数据库Oracle。 先在虚拟机上设置(我是系统安装之后,这样设置的) 如下图:点击最上面的网络图标(喇叭右边的那个),
我的虚拟机是virtualbox,安装的linux是OracleLinuxServer6.4。
主机是windows2003,现在想在windows2003上访问虚拟机的linux里面安装的数据库Oracle。
先在虚拟机上设置(我是系统安装之后,这样设置的)
如下图:点击最上面的网络图标(喇叭右边的那个),刚安完系统,这个图标有个红色的叉,点击第二项“system eth0”,就变成下图那种状态了。
在桌面上面打开终端
输入命令如下图,就可以看到本机eth0的IP地址了
记住这个地址,后面会用到。
远程访问工具puddy,可以到官网下载。
在windows系统中运行,不用安装,直接运行puddy.exe,出现下图的设置界面:
输入上面已经查找到IP地址,“保存的对话”处,输入一个名称,点击保存。然后选中它,点击“打开”
出现下图:在windows系统中运行
好了,可以访问Oracle数据库了,谢谢观看。

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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