This paper presents an access control mechanism for DHDBMSs.doi:10.1016/0167-4048(91)90124-VM.L. GoyalG.V. SinghComputers & SecurityGOYAL M SINGHG.Access control in distributed heterogeneous database management systems. Computers and Security . 1991...
DBMS的主要目标是提供一种可以方便、高效地存取数据库信息的途径。 设计数据库系统的目的:为了管理大量信息。 文件处理系统(file-processing system)储存组织信息的弊端有:数据冗余或不一致(data redundancy and inconsistency)、数据访问困难(difficulty in accessing data)、数据孤立(data isolation)、完整性问题(integrity...
当执行create命令创建对象时,Oracle会将对象存放到数据字典中,可以使用DBMS_METADATA可以获取对象定义语句,: SQL>SET LONG 4000 SQL>SELECT dbms_metadata.get_ddl('TABLE','EMP') ddl FROM DUAL; B:对象占用的空间 建立表,索引和族时,Oralce会给表,索引和族分配相应的空间,以存放这些对象的数据,通过数据字典,...
BEGINDBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(acl=>'test.xml', principal=>'COOLMA', is_grant=>true, privilege=>'resolve');END;/ 以上是给我们现有的ACL中加入了resolve的权限给COOLMA用户。 BEGINDBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL(acl=>'test.xml', host=>'www.baidu.com');END;/ 然后我们把主机w...
Access Control Rule In subject area: Computer Science An 'Access Control Rule' is defined as a rule that specifies the access authority of roles in a system, allowing managers to control access and grant authority based on assigned roles without delving into technical details. AI generated definit...
It becomes increasingly important to be able to tailor information in XML data for various users and applications, while preserving confidentiality. In this dissertation, we ask how fine-grained XML access control can be supported when underlying (XML or relational) DBMS does not provide any ...
CREATEORREPLACEFUNCTIONf_limited_query_t (s_schemaINVARCHAR2, s_objectINVARCHAR2) RETURNVARCHAR2 AS BEGIN RETURN'X <= 10000'; END; --3.Register VPD Policy. BEGIN DBMS_RLS.add_policy (object_schema =>'APPS', object_name =>'T', ...
In this dissertation, we ask how fine-grained XML access control can be supported when underlying (XML or relational) DBMS does not provide any security features for XML data.;We first present deep set operators for XML as an extension of conventional set operators, and use them to ...
Enterprise Distributed DBMS NoSQL Database Database SaaS Tool Networking CDN and Acceleration Network Security Data Security Application Security Domains & Websites Big Data Middleware Interactive Video Services Media On-Demand Cloud Real-time Rendering ...
To take advantage of the Advanced Queuing option of Oracle8 you can make use of the TOracleQueue component. The TOracleQueue component encapsulates the basic functionality of the DBMS_AQ package. It provides a convenient way to enqueue messages into a queue or to dequeue messages from a queue...