Query data in a system-versioned temporal table Learn ลงชื่อเข้าใช้ SQL ภาพรวม ติดตั้ง ความปลอดภัย การพัฒนา ดูแล
To create a system versioned table; --- System versioned table CREATE TABLE Department ( DeptID int NOT NULL PRIMARY KEY CLUSTERED , DeptName varchar(50) NOT NULL , ManagerID INT NULL , ParentDeptID int NULL , SysStartTime datetime2 GENERATED ALWAYS AS ROW START NOT NULL , SysEndT...
USE TemporalProductInventory; GO BEGIN --If table is system-versioned, SYSTEM_VERSIONING must be set to OFF first IF ((SELECT temporal_type FROM SYS.TABLES WHERE object_id = OBJECT_ID('dbo.ProductInventory', 'U')) = 2) BEGIN ALTER TABLE [dbo].[ProductInventory] SET (SYSTEM_VERSIONING...
強烈建議您將 SYSTEM_VERSIONING 設為DATA_CONSISTENCY_CHECK = ON,以針對現有資料強制執行資料一致性檢查。 如果偏好隱藏的資料行,請使用命令 ALTER TABLE [tableName] ALTER COLUMN [columnName] ADD HIDDEN;。 相關內容 暫存資料表 開始使用系統版本化的時間表 管理系統版本化時間表中的歷史資料保...
什么是 System-Versioned Temporal Table? System-Versioned Temporal Table,暂且容我管它叫版本由系统控制的临时表,它是 SQL Server 2016 中的新型用户表,用于保留完整的数据更改历史记录。 它之所以称为版本由系统控制的临时表,是因为每一行的有效期由数据库引擎管理。
Applies to: SQL Server 2016 (13.x) and later versions Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric There are three ways to create a system-versioned temporal table when considering how the history table is specified: Temporal table with an anonymous history ...
What is a system-versioned temporal table? Why temporal? How does temporal work? How do I query temporal data? Show 3 more Applies to: SQL Server 2016 (13.x) and later versions Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric ...
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed InstanceTemporal tables (also known as system-versioned temporal tables), are a database feature that brings built-in support for providing information about data stored in the table at any point in time, rath...
SQL Server periodically runs the Tuple Mover background task that compresses columnstore index rowgroups with uncompressed data, one such rowgroup at a time.Columnstore compression improves query performance but also consumes system resources. You can control the timing of columnstore compression manually...
SQL Server periodically runs the Tuple Mover background task that compresses columnstore index rowgroups with uncompressed data, one such rowgroup at a time.Columnstore compression improves query performance but also consumes system resources. You can control the timing of columnstore compression manually...