Yet another SQL Server enthusiast

2017-12-19

Azure SQL Datawarehouse vs Azure SQL Database – The main difference

Filed under: Uncategorized — sa @ 12:59 PM

The main difference between SQL DB and SQL DW is [from my point of view] how queries are executed:

  1. SQL DB is a SMP solution, meaning that is using only one computing node to execute queries while
  2. SQL DW is a MMP solution meaning that it would use one, two or more computing nodes.

In order to check number of computing nodes (or SERVICE OBJECTIVE) for SQL DW we can use following query:

AzureSQLDW

In this case, service object DW100 means that current SQL DW has only one computing node.

In order to change it to 10 nodes we have to use:

ALTER DATABASE MySQLDW
MODIFY (SERVICE_OBJECTIVE = 'DW1000')

Here you may find differences between these two databases.

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