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Primary key in an Azure SQL database


Primary key in an Azure SQL database

By : Android newBie
Date : November 25 2020, 01:01 AM
seems to work fine I'm working on a distributed system that uses CQRS and DDD principles. Based on that I decided that the primary keys of my entities should be guids, which are generated by my domain (and not by the database). , Considering the following
code :


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IdentityIsNotForReplication on SQL Server database primary keys prevent migration to SQL Azure

IdentityIsNotForReplication on SQL Server database primary keys prevent migration to SQL Azure


By : c-_-m
Date : March 29 2020, 07:55 AM
With these it helps NOT FOR REPLICATION is a property that can be applied to triggers, constraints and identity columns to prevent replicating them. You can set this property ON and OFF.
Here's a piece of T-SQL code to turn off NOT FOR REPLICATION for all tables:
code :
EXEC sp_msforeachtable @command1 = '
declare @int int
set @int =object_id("?")
EXEC sys.sp_identitycolumnforreplication @int, 0'
Can Azure Search be used as a primary database for some data?

Can Azure Search be used as a primary database for some data?


By : Md Taky
Date : March 29 2020, 07:55 AM
Hope that helps Although we generally don't recommend it, you might consider using Azure Search as a primary store if:
Your app can tolerate some data inconsistency. Azure Search is eventually consistent. When you index data, it is not available for querying immediately. Currently there is no mechanism to control concurrent updates to the same document in an index. When reading data using search queries, paging is not based on any kind of snapshot, so you may get missing or duplicated documents. You don't need to read out the entire contents of your index. Paging in Azure Search relies on the $skip parameter, which is currently capped at a maximum of 100000. For indexes larger than 100000 documents, it can be very tricky to read all your data out. You'll need to pick some field to partition on, and your reads have no consistency guarantees. In case of accidental deletion, you are ok with losing your data. Azure Search does not support backup/restore as of the time of this writing. If you accidentally delete your data, you will need to re-index it from its original source. You won't need to change your index definition much. Modifying or removing fields from your index currently requires re-indexing all your data (you can add new fields without re-indexing). If Azure Search is your primary store, your only option may be to try to read all the data from your old index into a new one, which is subject to all the aforementioned limitations around consistency, $skip, etc. Your application's query needs match the features that Azure Search provides. Azure Search supports full-text search, facets, and a subset of the OData filter language, but it does not support things like joins between indexes or arbitrary aggregations. If your app needs different query features than what Azure Search provides, you should consider another NoSQL solution like Azure Cosmos DB. Your application can tolerate high write latency. Since it is a search engine and not a general-purpose DB, Azure Search is optimized heavily for query performance (especially full-text search queries). This comes at the cost of slower write performance, since every write requires a lot of work to index the data. In particular, you will get the best write throughput by batching indexing actions together (batches can contain up to 1000 indexing actions). Writing documents one at a time to the index will result in much lower throughput.
Supported way to get Primary Key Name in Azure SQL Database

Supported way to get Primary Key Name in Azure SQL Database


By : Sávio Eduardo
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Although the main System Information Schema Views topic in the documentation does not indicate the INFORMATION_SCHEMA views are supported in Azure SQL Database, all of the view-specific doc pages do indicate the view is supported with sole the exception of KEY_COLUMN_USAGE. That seems a bit odd so it might just be a documentation issue. I'll reach out to see if I can confirm this.
I'd be inclined to use the SQL Server catalog views instead of ISO INFORMATION_SCHEMA views unless cross-DBMS compatibility is specifically required since those include additional meta-data one may find useful.
How to configure the alert whenever the primary Azure SQL Database goes down?

How to configure the alert whenever the primary Azure SQL Database goes down?


By : ali
Date : March 29 2020, 07:55 AM
Does that help You reference this blog: In Azure, how can you configure an alert or notification when a SQL Server failover happened?
CKelly found a way to script this in Azure using Automation Accounts > Runbook > using Powershell. A simple script like this should do it. Just need to figure out the run as account and trigger it by schedule or alert.:
code :
function sendEmailAlert
{
    # Send email
}


function checkFailover
{
    $list = Get-AzSqlDatabaseFailoverGroup -ResourceGroupName "my-resourceGroup" -server "my-sql-server"

    if ( $list.ReplicationRole -ne 'Primary')
    { 
        sendEmailAlert
    }
}

checkFailover
Is it possible to set Primary keys in the HUB database in Azure Data Sync?

Is it possible to set Primary keys in the HUB database in Azure Data Sync?


By : newbi2014
Date : March 29 2020, 07:55 AM
wish helps you In Data Sync, changing PK values is not supported, you need to delete the record and insert a new one.
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