Skip to main content

Cross Database Queries in SQL Azure DB - Part 2

Hi All
 
So After a month of using Cross Database Queries in SQL Azure DB, I can say that we have a very useful tool.
 
We can use in many scenarios, I will show today one.
 
We are using 10 shards DB's to balance read operations to many DB's. The write operations goes to the DB's as well.
 
I' as a DBA wants to know the status of all DB's, so instead of creating PowerShell that connect to all of the DB's I have created external tables in 1 DB that reads the  
 
sys.dm_db_resource_stats 
 
from all DB's' so I have now 1 real table and 9 external tables.
 
I have created a view that reads from al 10 tables' and now I see all data from all shards.
 
I also put it in PowerBI and I see it in a visual way - and also in my Mobile.
 
Here I have in the first line DTU AVG value for each shard in the last 10 minutes, 1 clock that avg all shards.
 
The second line is the DTU real value in the last 10 Minutes per Shard.
The Third line is the DATA IO value in the last 10 Minutes per Shard.
 
 
 
I More thing, in ssms in sql server 2016 you have special place for external tables:
 
 
 
 
But in SQL Azure - not yet, and even if you will run create script you will not see it.... just use :
 
select * from sys.external_data_sources
select * from sys.external_tables
 
enjoy.
 
Labels:

Comments

Post a Comment

Popular posts from this blog

Extended Events in SQL Azure

Hi Everybody   Today an English post about 'Extended Events in SQL Azure', some of you shorten the name to 'EE' and some to 'XEvent'. I Love EE so this is how I will call it in this post.   This feature was introduce in SQL Server 2008 and its should help collecting DATA about what is running in the Server.   More Details about this SQL Server feature can be found in this Link: https://msdn.microsoft.com/library/bb630282.aspx?f=255&MSPPError=-2147217396   There are a few differences between EE in SQL Azure and regular SQL Server: In SQL Server versions the EE are on the Server level and therefore you create sessions on Server. In SQL Azure the server is a virtual entity - so the EE is in DB level and you create the session on DataBase. In SQL Server versions the EE can write to files on the server. SQL Azure does not have drives for files (SQL Azure is PAAS.....:-)). There is an option to write to blob storage, for this we need t...
Post a Comment
Read more

How to restore deleted Azure Synapse dedicated SQL pool

  Existing dedicated pool can be easily restored from Azure portal or PowerShell command, but for now deleted pool could be restored from PowerShell only! Example: # Connect to Azure with system-assigned managed identity $AzureContext = (Connect-AzAccount -Identity).context # set and store context $AzureContext = Set-AzContext -SubscriptionName $AzureContext.Subscription -DefaultProfile $AzureContext # $AzureContext = Set-AzContext -SubscriptionName $SubscriptionName -DefaultProfile $AzureContext $SubscriptionName="Databases" $ResourceGroupName="stg-rg-we" $ServerName="stg-synapse-we"   $DatabaseName="sql_we_2023_11_07_13_42" $NewDatabaseName="sql_dp_we_deleted" ######################################## $token = (Get-AzAccessToken -ResourceUrl https://database.windows.net).Token $SubscriptionId = "ce088f9e-1111111a3914b" $DedicatedPoolEndPoint = "stg-synapse-we.sql.azuresynapse.net" $DedicatedPoolName = $DatabaseNam...
Post a Comment
Read more

The journey to the Lakehouse

A long time has passed since the last post, we have gone through a long and tedious journey to adapt what Azure offers us, to our needs. Our needs were simple, the Current Datawarehouse (SQL Server on VM inazure) served the BI. ML teams worked on GCP, we want to let both teams to work on Azure in a platform that will have the ability to scale and will not fail every 2 days. We checked: Snowflake on azure Synapse analytics GCP We decided to go for the full Azure product for the reasons: Migration time support costs Synapse as a platform contains many components, and the challenge was to find what fits  us as an organization and as a group. The knowledge of the people and their abilities influenced the plans. Here's what we planned and what we did: We start to put everything in the Data Lake in parquet or delta format, build on top of Azure ADLS gen 2. We had to move some data to T-SQL compatible platform, so this involves setting up a dedicated Synapse pool , which is a fully man...
Post a Comment
Read more