在關聯式資料庫 (Relational Database) 中,必須將所有的規則 (Rule) 套用於交易的修改,以維護所有的資料整合性 (Integrity)。 所有的內部資料結構,例如 B 型樹狀結構索引 (B-tree Index) 或是雙向連結串列 (Doubly Linked List),在交易終止時必須是正確的。
此程序依賴資料表 dbo.DomainIntegrity、dbo.ReferentialIntegrity 和dbo.UniqueIntegrity 取得需要驗證的完整性規則 - 此範例會根據 AdventureWorks2022 資料庫中原始資料表的檢查、外部索引鍵及唯一條件約束,以填入這些資料表。 這依賴協助程式程序 dbo.usp_GenerateCKCheck、dbo.usp_GenerateFKCheck 和dbo.Generate...
dbo.usp_ValidateIntegrity 可选参数:@object_id - 要验证其完整性的对象的 ID 此过程依赖于用于需要验证的完整性规则的表dbo.DomainIntegrity、dbo.ReferentialIntegrity和dbo.UniqueIntegrity- 示例基于对AdventureWorks2022数据库中的原始表存在的检查、外键和唯一约束来填充这些表。
In SQL Server, there are mainly two kinds of data integrity: 1. System-defined or Predefined integrity 2. User-Defined integrity System defined / Predefined integrity: Entity Integrity - This integrity is used to ensure uniqueness and availability of data. - Primary Key, Unique, Not null Code:...
When user code runs inside the CLR-hosted environment in SQL Server (called CLR integration), the following design goals apply: Reliability (safety) User code shouldn't be allowed to perform operations that compromise the integrity of the Database Engine process, such as popping a message box ...
\program files\Microsoft SQL Server\mssql\data\mydb.MDF'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe, system-level error condition that threatens database integrity and must be corrected immediately. It is recommended to ...
Applies to: SQL Server Azure SQL Managed Instance Trace flags are used to set specific server characteristics or to alter a particular behavior. For example, Trace Flag 3226 is a commonly used startup trace flag that suppresses successful backup messages in the error log. Trace flags are frequen...
Currently, SQL Server supports foreign key constraints to identify the relationships between tables and ensure referential integrity. This concept has been extended to support the ANSI definition of cascading delete and update operations. The current implementation is equivalent to the new NO ACTION const...
Database X must be available as close to 24x7 as possible and no data loss can be tolerated. Database X also relies on stored procedures in the master database and must be hosted on a SQL Server 2008 instance on a server in security domain Y. ...
In SQL Server, you use UNIQUE and CHECK constraints, which are database objects that enforce data integrity in SQL Server tables. To validate that a value is valid in another table, use a foreign key constraint. To validate that a value in a column is within a specific ...