PAGE compression minimizes the data redundancy in columns in one or more rows on a given page. It uses a proprietary implementation of the LZ78 (Lempel-Ziv) algorithm, storing the redundant data only once on the page and then referencing it from the multiple columns. Note that when you use...
Figure 3 T-SQL Code to Create a SQL Agent Proxy Figure 5 Execution Context Figure 6 Create Master Key Figure 7 Open Symmetric Key SQL Server On The Horizon: Improved Data Security In SQL Server 2005 Don Kiely Prerelease info in this article is subject to change. ...
The most important contrast between database mirroring and failover clustering is the level at which each provides its redundancy. Database mirroring provides protection at the database level, whereas clustering provides protection at the server instance level. Another important difference is that in da...
将包含 FILESTREAM 选项“目录名称”的数据库附加到 SQL Server 实例中将提示 SQL Server 验证 Database_Directory 名称是否唯一。 否则,操作ATTACH将失败并显示错误FILESTREAM Database_Directory name is not unique in this SQL Server instance。 为避免此错误,应将可选参数directory_name传递给此操作。
Geo-restore is available when the backup storage redundancy property is set togeo-redundant backup storage. Point-in-time restore (PITR) You can configure a specific point in time retention policy for each database running on a SQL Database offering. SQL Database ...
By default, Azure SQL Database achievesavailabilitythrough local redundancy, making your database available during: Customer initiated management operations that result in a brief downtime Service maintenance operations Issues with the: rack where the machines that power your service are running ...
数据库概述(Introduction) 什么是数据库管理系统 Database Management System (DBMS) 数据 + 管理系统 数据库存在的价值 Data redundancy and inconsistency(冗余与不一致性) Difficulty in accessing
A snowflake schema consists of one fact table that is connected to many dimension tables, which can be connected to other dimension tables through a many-to-one relationship. This schema offers the advantage of low levels of data redundancy but is not as effective when it comes to query perf...
Database mirroring provides complete or almost complete redundancy of the data, depending on whether the operating mode is high-safety or high-performance. For more information, see "Operating Modes," later in this topic. A database mirroring partner running on SQL Server 2008 Enterprise or later...
Employs cost-effective object storage as primary storage. High availability can be achieved through erasure coding technology with only about 150% data redundancy. It also provides high-speed caching capabilities, balancing cost and performance via a multi-tiered storage strategy that separates hot and...