What is merge in Oracle |Merge statement in Oracle #Oracle #Merge
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In this video, we’ll learn what the Oracle MERGE statement does and how you can use it.
What is the MERGE statement? It’s a statement that lets you either insert or update data in a table - all in a single statement!
It’s helpful if you’re using an ETL (Extract Transform Load) process when creating or updating a data warehouse. It’s also helpful when loading data into your own database if you’re not creating a data warehouse.
It allows you to prevent duplicate data and ensure you have up-to-date data in your table.
The syntax looks like this:
MERGE INTO target
USING source
ON (condition)
WHEN MATCHED THEN update_clause
DELETE where_clause
WHEN NOT MATCHED THEN insert_clause
In this video, I also show an Oracle SQL MERGE statement example, so watch the video to find out more.
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