Row Counts From Statistics In Azure DW

Derik Hammer has a script to estimate row counts in an Azure SQL Data Warehouse table:

Azure SQL Data Warehouse is a massively parallel processing (MPP) architecture designed for large-scale data warehouses. An MPP system creates logical / physical slices of the data. In SQL Data Warehouse’s case, the data has 60 logical slices, at all performance tiers. This means that a single table can have up to 60 different object_ids. This is why, in SQL Data Warehouse, there is the concept of physical and logical object_ids along with physical names.

Below is a query for finding row counts of tables in SQL Data Warehouse which accounts for the differences in architecture between my earlier script, written for SQL Server, and SQL Data Warehouse.

Click through for the script.

Related Posts

The Forgotten Infrastructure Below Azure BI Architecture Diagrams

Meagan Longoria reminds us that there are several products which Azure BI projects need but which we tend to forget when building architectural diagrams: Let’s start with Azure Active Directory (AAD). In order to provision the resources in the diagram, your Azure subscription must already be associated with an Active Directory. AAD is Microsoft’s cloud-based […]

Read More

AzureR Packages In Cran

David Smith points out that the Azure packages for R are now in CRAN: The suite of AzureR packages for interfacing with Azure services from R is now available on CRAN. If you missed the earlier announcements, this means you can now use the install.packages function in R to install these packages, rather than having to install from the […]

Read More

Categories

January 2018
MTWTFSS
« Dec Feb »
1234567
891011121314
15161718192021
22232425262728
293031