I want to insert table from different factory / server in Azure data warehouse. Is it possible to insert by query?
Because it takes a lot of time if I make dataset and pipeline for each table in Azure data factory.
Just from your screenshot, according the icon of the Azure SQL, you're using Azure SQL database, not Azure Data Warehouse.
You could use Elastic Query to do a cross database query in Azure.
Ref the tutorial: Get started with cross-database queries (vertical partitioning) (preview)
Elastic database query (preview) for Azure SQL Database allows you to run T-SQL queries that span multiple databases using a single connection point. This article applies to vertically partitioned databases.
When completed, you will: learn how to configure and use an Azure SQL Database to perform queries that span multiple related databases.
Then you can inset data from external table to current database table.
Note: Azure SQL database already has the master key, you don't need create it again.
Hope this helps.
Related
I am using external table of main database to Datawarehouse database. While selecting data from external table to # table it take almost 9 min, sometime it take more time. How I can improve this performance of external table?
Is to use the following TSQL to perform the query in the external database and get only the data required. The filter will be applied first in the external database, and then the data from the filter will be received by the database.
When you enable the query's Actual Execution Plan option, you can see
that the query : Select * from PerformanceVarcharNVarchar, brings data
from an external database to the temporal database, and then the
engine applies the filter.
Here is the Official Microsoft Documents :EXECUTE (Transact-SQL) | Docs
Else you can use Azure Data Sync : SQL Data Sync is an Azure SQL Database-based service that allows you to synchronize selected data bidirectionally between multiple databases, both on-premises and in the cloud.
The Original Post has got detailed insights: Lesson Learned #56:
External tables and performance issues | techcommunity
I need to merge with 2 different tables from 2 different azure SQL databases where as these two azure sql database are from same azure sql server.
also for performance imporvement purpose, what I need to do is bulk insert and/or bulk update. also, this will be continous activity. for very first time I have to merge all data which is huge. and then whenever respective topic recivies message, I need to add/update that single record only.
what are the different options to do the same. for both processes.
please help. thanks.
You can use Azure SQL Data Sync to merge those tables located on 2 different databases into a third and new database. You just need to create the table with no records, then use Azure SQL Data Sync with one-way sync from those 2 databases (member databases) to the newly created table on the new database (hub database). On the first sync data will be merged on the new table located on the hub database. Every time a record gets updated, deleted or new record arrive on the member databases then that data change is replicated to the hub database and to the merged table.
To know more about the free Azure SQL Data Sync please read here.
We need to do a weekly sync of data in an Azure SQL table into a Cosmos db table. The Azure SQL table is the source and has millions of records. Has anyone done this before and was there a tool used to do this?
Surely,i'd suggest you using Copy activity in Azure Data Factory which is applied for data transfer. You could configure Azure SQL DB as source and Cosmos db as sink. Please see the document:https://learn.microsoft.com/en-us/azure/data-factory/copy-activity-overview#supported-data-stores-and-formats
For your need, you need to do a weekly sync of data so you could create a schedule trigger for the copy activity.
Is it possible to create an external table in Azure SQL of the data residing in Azure Table storage?
Answer is no.
I am currently facing similiar issue and this is my research so far:
Azure SQL Database doesn't allow Azure Table Storage as a external data source.
Sources:
https://learn.microsoft.com/en-us/sql/t-sql/statements/create-external-data-source-transact-sql?view=sql-server-2017
https://learn.microsoft.com/en-us/sql/t-sql/statements/create-external-file-format-transact-sql?view=sql-server-2017
https://learn.microsoft.com/en-us/sql/t-sql/statements/create-external-table-transact-sql?view=sql-server-2017
Reason:
The possible data source scenarios are to copy from Hadoop (DataLake/Hive,..), Blob (Text files,csv) or RDBMS (another sql server). The Azure Table Storage is not listed.
The possible external data formats are only variations of text files/hadoop: Delimited Text, Hive RCFile, Hive ORC,Parquet.
Note - even copying from blob in JSON format requires implementing custom data format.
Workaround:
Create a copy pipeline with Azure Data Factory.
Create a copy
function/script with Azure Functions using C# and manually transfer
the data
Yes, there are a couple options. Please see the following:
CREATE EXTERNAL TABLE (Transact-SQL)
APPLIES TO: SQL Server (starting with 2016) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse
Creates an external table for PolyBase, or Elastic Database queries. Depending on the scenario, the syntax differs significantly. An external table created for PolyBase cannot be used for Elastic Database queries. Similarly, an external table created for Elastic Database queries cannot be used for PolyBase, etc.
CREATE EXTERNAL DATA SOURCE (Transact-SQL)
APPLIES TO: SQL Server (starting with 2016) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse
Creates an external data source for PolyBase, or Elastic Database queries. Depending on the scenario, the syntax differs significantly. An external data source created for PolyBase cannot be used for Elastic Database queries. Similarly, an external data source created for Elastic Database queries cannot be used for PolyBase, etc.
What is your use case?
I want to maintain the relationship between azure tables and want to insert /update data from on campus database using sql server management studio 2016. It does not give option of chcek/nocheck constraints, as it goes off on number of prefixes?? Please help.
if you want to update/insert azure database and maintain relation, only one way,you can use Transactional replication.
if you want to keep both the databases in sync,you will have rollout some custom solution like below ..
1.write an exe,which can read both tables and compare them .
2.Schedule this as per your frequency from SQlagent in onpremise