Learn about the change tracking feature of SQL Server, which provides a lightweight solution for tracking changes to user tables.
In SQL Server 2025 (17.x) Preview and later versions, change tracking autocleanup process introduces a new adaptive shallow cleanup approach for large side tables. This new approach expunges data below a safe cleanup point. This point is found based on configured cleanup depth and retention peri...
SQL Copy SET @synchronization_version = CHANGE_TRACKING_CURRENT_VERSION(); When an application obtains changes, it must use both CHANGETABLE(CHANGES...) and CHANGE_TRACKING_CURRENT_VERSION(), as shown in the following example. SQL Copy -- Obtain the current synchronization version. This w...
CHANGE_TRACKING_MIN_VALID_VERSION(OBJECT_ID(N'dbo.tb')),*FROMCHANGETABLE(CHANGES dbo.tb,0) CHGLEFTJOINdbo.tb DATAONDATA.id=CHG.id;--b. 更新数据BEGINTRAN;UPDATEdbo.tbSETcol1=11WHEREid=1;UPDATEdbo.tbSETcol1=111WHEREid=1;COMMITTRAN;SELECTCHANGE_TRACKING_CURRENT_VERSION(), CHANGE_TRACKING_...
使用CHANGE_TRACKING_IS_COLUMN_IN_MASK结合CHANGETABLE DECLARE@versionBIGINT;--get previous versionSELECT@version=CHANGE_TRACKING_CURRENT_VERSION()-1;SELECT*, CHANGE_TRACKING_IS_COLUMN_IN_MASK(COLUMNPROPERTY(OBJECT_ID('dbo.NewTable'),'BigColumn','COLUMNID'), ...
Change tracking in SQL Server 2008 enables applications to obtain only changes that have been made to the user tables, along with the information about those changes. With change tracking integrated into SQL Server, complicated custom change tracking solutions no longer have to be developed. Change...
SQL Server审计功能入门:更改跟踪(Change Tracking) 介绍 更改跟踪是一种轻量型解决方案,它为应用程序提供了一种有效的更改跟踪机制。常规的,自定义变更跟踪和读取跟踪数据,会使用触发器,存储过程和记录变更的用户表等, 还需要保证访问一致和相关清理工作。 使用CT会减少额外工作量和保证访问一致性。
Applies to: SQL Server Change Tracking is a lightweight solution that provides an efficient data change tracking mechanism for applications, ETL processes, event capture, and auditing. This allows for quick and basic detection of changed data without the need for expensive an...
SQL Server 2008: CDC和Change Tracking 经常会有需求记录用户表中由DML操作(Insert/Updae/Delete)引起的数据变化,在SQL Server 2008 以前的版本中,要实现这样的功能只能通过Trigger或者数据比对(例如SCD处理),而且必须针对每个用户表开发。SQL Server 2008中新增了两种记录数据变化的功能,本文就Change Data Capture(CDC...
A database snapshot is a read-only, static view of a SQL Server database (the source database), so change tracking data in the database snapshot is of the time when the snapshot was taken on the AG database from the secondary replica. Note When a failover occurs on a database ...