Can you truncate a replicated table?

Can you truncate a replicated table?

Truncate cannot be used in certain cases like replication / foreign key contraints, etc. As per Microsoft documentation you need to use delete. You cannot use TRUNCATE TABLE on tables that: Are referenced by a FOREIGN KEY constraint.

How do you truncate a staging table?

DROP vs DELETE vs TRUNCATE for staging data

1. Load the data into staging stable, mark this data as new, load only marked data into target, unmark data.
2. Delete all data in staging, load the data into staging table, load all data into target.
3. Truncate staging table, load into staging, load into target.

Can we use truncate in transaction?

2 Answers. In SQL Server, you can rollback a TRUNCATE from a transaction. It does write page deallocation to the log, as you mentioned. In Oracle, TRUNCATE TABLE is a DDL statement that cannot be used in a transaction (or, more accurately, cannot be rolled back).

Can truncate table that are published by using transactional replication or merge replication?

The replication itself worked good, but the Truncate table is not allowed in the transactional replication and merge replication. We have to use “Truncate table” in another processes during replication.

What is truncate and load in ETL?

Truncate & Load: The target table is deleted completely first, and all data records from source system is inserted afresh. Delta Load: Here, the source data records are first checked for changes i.e. New records inserted and Old records updated.

How do I delete data from staging table?

Ideally, first try inside a ‘test’ (or ‘development’) database first (to make sure you understand/test the procedure).

1. Inside the Controller application, click “Transfer – External Data – Import From Staging Table”
2. Highlight the relevant old jobs (for example any job older than 1 month)
3. Click the ‘delete’ icon.

Why do we TRUNCATE a table?

Typically, TRUNCATE TABLE quickly deletes all records in a table by deallocating the data pages used by the table. This reduces the resource overhead of logging the deletions, as well as the number of locks acquired. Records removed this way cannot be restored in a rollback operation.

Does TRUNCATE need commit?

The TRUNCATE TABLE statement is a DDL command, so it includes an implicit COMMIT , so there is no way to issue a ROLLBACK if you decide you didn’t want to remove the rows. …

Is DELETE can be rolled back?

DELETE is a DML Command so it can be rolled back. The DELETE command returns the number of records that were deleted by its execution.