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What is cross database transaction?
A Cross database transaction occurs between 2 or more databases on the same server. It does not require the involvement of a DTC (Distributed Transaction Coordinator) A Distributed database transaction occurs between 2 or more databases hosted on multiple servers.
How do you maintain transactions across multiple databases?
The best way is to copy the data in a single place. Use a scheme which allows you to abort the copy and continue it at any time (for example, ignore data which you already have or order the select by ID and request only records > MAX(ID) of your copy). Protect this with a transaction.
Is there support for cross database transactions in SQL Server 2016?
In SQL Server 2016 SP1 and before, cross-database transactions within the same SQL Server instance are not supported for availability groups. There’s support in newer versions, but the availability group had to have been created with WITH DTC_SUPPORT = PER_DB. There’s no altering the availability group after it’s been created.
Can you have two databases in the same availability group?
In SQL Server 2016 SP1 and before, cross-database transactions within the same SQL Server instance are not supported for availability groups. No two databases in a cross-database transaction may be hosted by the same SQL Server instance if either or both databases are in an availability group.
Where is availability group was not created with enable distributed transaction?
Where the availability group was not created with enable distributed transaction. Database mirroring. Determine the appropriate default outcome of transactions that DTC is unable to resolve for your environment. For information on how to configure the default outcome see in-doubt xact resolution Server Configuration Option.
When does SQL Server not support distributed transactions?
All instances of SQL Server that participate in the availability group must be SQL Server 2016 or later. Specific cases where distributed transactions are not supported include: In SQL Server 2016 SP1 and prior, where more than one database involved in the transaction is in the same availability group.