1. **选项A(数据冗余)**:CHECK关键字与数据冗余无关。数据冗余通常指重复存储数据,而CHECK用于定义数据的有效性规则,不涉及存储结构。 2. **选项B(查询效率)**:查询效率通常通过索引或优化查询语句实现,CHECK约束的作用是限制数据输入,与查询效率无关。 3. **选项C(引用完整性)**:引用完整性通过外键(FOREIGN...
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...
通过T-SQL 创建数据库时,不会强制实施 Azure 策略。 若要在使用 T-SQL 创建数据库时指定数据驻留,请使用 LOCAL 或 ZONE 作为 CREATE DATABASE 语句中 BACKUP_STORAGE_REDUNDANCY 参数的输入。 其他资源 活动 加入AI 技能节挑战 4月8日 23时 - 5月28日 15时 ...
Database mirroring in SQL Server allows you to keep a copy, or mirror, of a SQL Server 2005 database on a standby server. Mirroring ensures that two separate copies of the data exist at all times, providing high availability and complete data redundancy. The .NET Data Provider for SQL ...
In many cases database mirroring can provide the same kind of data redundancy as log shipping with higher availability and automatic failover. However, if your application relies on multiple databases on one server, log shipping may be an equally valid approach (see "Multi-Database Considerations...
超大規模化彈性集區2024 年 9 月使用超大規模資料庫彈性集區管理及擴展 Azure SQL 資料庫中的多個超大規模資料庫。 Hyperscale elastic pools also support Premium-series hardware and zone redundancy. 如需詳細資訊,請參閱超大規模資料庫彈性集區現已全面推出。
In this article, we have discussed the problem of SQL data error cyclic redundancy check. We have given the various causes of this CRC error. To resolve this problem the user can try the manual method. In case if your SQL server database is corrupted then the user can take the help of...
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
Database mirroring in SQL Server allows you to keep a copy, or mirror, of a SQL Server database on a standby server. Mirroring ensures that two separate copies of the data exist at all times, providing high availability and complete data redundancy. The .NET Data Provider for SQL Server ...
If you have agood disaster recovery planset up, then you should have no problems when your production database or any other database gets corrupted due to SQL Database Cyclic Redundancy Check (CRC) error. Now let’s say you find yourself in a situation where a proper DR plan was not es...