How can I tell if a table is versioned?

How can I tell if a table is versioned?

The easiest way to check if temporal table exists is by using the system table sys. tables. From sys. tables, you can use the columns temporal_type or temporal_type_desc for this purpose.

How do I enable system versioning in SQL Server?

For each table to which we want to add system versioning, we need to:

1. add two columns that will store the period of validity for each row;
2. define a period for the table based on the two columns above;
3. if there isn’t one already, add a primary key;
4. enable versioning and define the name of the history table.

How do I turn off system versioning?

You may want to stop versioning on your temporal table either temporarily or permanently. You can do that by setting the SYSTEM_VERSIONING clause to OFF.

How do I see recently updated tables in SQL Server?

Columns

1. schema_name – schema name.
2. table_name – table name.
3. create_date – table creation date.
4. modify_date – last update time of table (by ALTER statement)

What is system Versioning in SQL Server?

A system-versioned temporal table is a type of user table designed to keep a full history of data changes to allow easy point in time analysis. This type of temporal table is referred to as a system-versioned temporal table because the period of validity for each row is managed by the system (i.e. database engine).

What is system-versioned table in SQL Server?

How do I see who has updated a table in SQL?

In order to find out who update the table, you could try with below options:

1. Try and read the Transaction Logs to see what happened.
2. Start trace in SQL Server profiler and checked events(TSQL-SQL:BatchCompleted,SQL:BatchStarting,SQL:StmtCompleted and SQL:StmtStarting)(Recommended).

When to enable SYSTEM VERSIONING in SQL Server?

System-Versioning can be enabled when a table is created using the CREATE TABLE statement or after creating the table using the ALTER DATABASE statement.

How to query data in a system-versioned temporal tables in..?

This will return all current (actual) data: This will return all data changes ( Update, Delete, Merge) that were made in the dbo.People system versioned table: This clause will return all the rows from both the dbo.People system versioned and dbo.PeopleHistory history table.

How to check if a temporal table exists?

Alter the current table and set off the system versioning. Drop the current table. Drop the history table. In my earlier articles, we have seen how to check if temporal table exists and how to find the corresponding history table of a temporal table.

How to change the history of a table?

Alter the current table and switch on SYSTEM_VERSIONING, specify history table in HISTORY_TABLE parameter and switch on DATA_CONSISTENCY_CHECK. Here is the sample script. For this example, consider that the classic current / main table is People, history / version table is PeopleHistory and the trigger name is People_OnUpdateDelete.