MERGE

SQLServerCentral Article

Getting started with the SQL MERGE statement

  • Article

This article is focused on beginners who have already started writing SQL queries and are now diving deep towards more data processing and complex queries in SQL. When we talk about data processing, an important concept that comes to our mind is performing ETL workloads to a data warehouse. ETL is a very complex topic […]

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2021-01-26

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External Article

Using the MERGE Statement to Perform an UPSERT

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The term UPSERT has been coined to refer to an operation that inserts rows into a table if they don’t exist, otherwise they are updated. To perform the UPSERT operation Microsoft introduced the MERGE statement. Not only does the MERGE statement support the UPSERT concept, but it also supports deleting records. Greg Larsen discusses how to use the MERGE statement to UPDATE, INSERT and DELETE records from a target table.

2014-12-22

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Question of the Day

Default Objects in Clones

On SQL Server 2022, I do this:

USE model
GO
CREATE TABLE dbo.DBALog
(logdate DATETIME2(3), logmsg VARCHAR(2000))
GO
I then create a new database:
CREATE DATABASE INVENTORY
GO
I install a new database application in here with multiple tables, views, etc. I do not run any queries. I then decide to run this code:
DBCC CLONEDATABASE(INVENTORY, Inventory_clone);
GO
What happens?

See possible answers