Questions tagged [azure-synapse-analytics]
For questions about Azure Synapse (formerly Azure SQL Data Warehouse). It is an analytics service that brings together enterprise data warehousing and Big Data analytics.
78
questions
4
votes
1
answer
618
views
Revision Tracking & Source Control for Azure SQL Data Warehouse
What is a good approaching for tracking incremental changes to database tables, stored procedures, etc for Azure SQL Data Warehouse?
I am in the process of moving a large database over to Azure SQL ...
CommunityBot
- 1
0
votes
1
answer
332
views
Azure Dedicated SQL pool - group has db_datareader access but cannot login
We have created Test AD Group and they should have readonly access to the database (schemas and tables, views) in the Azure SQL dedicated pool.
Our DBA team did it but the users in the Test AD Group ...
CommunityBot
- 1
1
vote
2
answers
339
views
SQL Server tempdb files growth increment size
In our Azure SQL Managed Instance, we have 12 tempdb data files each of size 11GB. The Log file growth value is set to a max default size of 2TB. The growth value of each data file is 32GB.
Question: ...
- 8,611
1
vote
1
answer
1k
views
How to see what's using TempDb space in Azure SQL DW?
I'm having problems with TempDb being full. Are there any system views I can see to diagnose what's using up TempDb and/or how much space is still available on it?
It would be awesome to also see ...
CommunityBot
- 1
0
votes
0
answers
24
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Azure Synapse query to multiple JSON files in data lake, parse data into table format
I want to query RAW telemetry data stored in JSON format in my data lake. I am using Azure Synapse to query the files.
I can successfully pull the data I want into a result table, but I struggle to ...
- 193
1
vote
0
answers
24
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Schema Drift & Delta Table update - cannot resolve `target.new_column` in UPDATE clause given columns [list of columns]
Using Azure Synapse Analytics, I have configured a pipeline and a Mapping Data Flow that were working great until I recently added a Derived Column to my Mapping Data Flow, which created a column that ...
- 25.2k
2
votes
1
answer
1k
views
Azure Synapse SQL Pool: Issue in MERGE INSERT UPDATE statement
I have a table in Azure Synapse Dedicated SQL POOL.
CREATE TABLE table_A
(
ID int IDENTITY(1,1),
ClientID varchar(10),
fitrstname varchar(20),
lastname varchar(30),
phone ...
CommunityBot
- 1
0
votes
1
answer
247
views
Generating MD5 Hash for NVARCHAR and VARCHAR columns across different databases
I am building a utility that generates a single MD5 hash across all CONCATENATED column values for any table row. To make this work, I have to eliminate NULL values using COALESCE and must CAST NUMBER ...
0
votes
1
answer
181
views
Database Scoped Credential with User-Assigned Managed Identity possible?
We have a data lake (Azure Data Lake Gen 2) that contains single folders with data for specific use cases in the 'gold' container, e.g. for a financial dashboard (folder 1) or a production dashboard (...
- 15
1
vote
3
answers
1k
views
What are the limitations in Synapse Analytics compared to normal SQL Server?
I'm keen to get a list of the feature limitations or suprises when using Synapse Analytics (a.k.a. Dedicated SQL Pool, used to be known as SQL DW / SQL Data Warehouse) compared to using normal SQL ...
- 628
0
votes
1
answer
351
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Dedicated SQL Pool In Azure - Cannot use System Views to calculate size for tables
I know that it's a repeated question but I've tried all solution and workaround suggested from every possible question present on stackoverflow.com
I have inherited a dedicated SQL Pool with a SQL ...
- 35.2k
0
votes
0
answers
49
views
How to store LineString or Point data type in Azure Synapse?
I have JSON files that I need to store in Azure Synapse table.
One record looks like this:
{ "type": "Feature", "properties": { "id": 12356}, "geometry&...
0
votes
0
answers
159
views
Copy data from Data Lakes to Dedicated SQL Pool - Data Type overflow error
We have a synapse pipeline that copies data from Data Lakes (Parquet Files) to the Dedicated SQL Pool in Azure. The problem is that some of the Copy Data tasks fail with a "Arithmetic overflow ...
- 11
3
votes
1
answer
1k
views
How are deadlocks detected by Synapse
I'm trying to produce a deadlock in Azure Synapse. I would have expected it to work much as on-prem SQL Server does given the documentation says it "applies to" Synapse. I've waited an ...
CommunityBot
- 1
0
votes
1
answer
199
views
Hash, Replication, and Round Robin Distributions - Need more clarification
I will give a few examples of the tables we have:
Table1 - Most queries are State Code and Year, has about 1000 rows, will grow by 1000 rows a year, used Round Robin
Table2 - Most queries are by ...
- 45.9k
1
vote
1
answer
108
views
Azure Dedicated SQL Pool - How to checksum a table?
We're moving all our on premise tables into the azure dedicated sql pool. We're using synapse workspace pipelines to import the data into the dedicated pool.
Is there a way to checksum a table to ...
- 1,708
0
votes
2
answers
591
views
How to rtrim the slash character (/)?
rtrim('txt/','/')
What if we cannot use this version of the rtrim function.. How else to remove the trailing '/' from the end of a string (if present)?
- 29.5k
0
votes
0
answers
670
views
Accessing Secured Storage account from Synapse Notebook
We have a Firewalled storage account which has a few files that we need to access via Synapse notebook. We do that with below code :
abfss_path = f'abfss://[email protected]....
- 2,288
1
vote
0
answers
183
views
How do I change the database owner in Synapse Analytics Serverless SQL Pool?
I am working with Azure Synapse Serverless SQL Pool. A former employee created the databases in the pool, and is listed as their owner. Consequently, I cannot drop the login.
I would like to change ...
- 111
5
votes
1
answer
718
views
User can drop table from a schema, but cannot create one
In an Azure Synapse dedicated SQL pool I have the following setup:
-- a custom DB role to manage privileges
CREATE ROLE [owner];
-- there is a schema owned by this role
CREATE SCHEMA [myschema] ...
- 83k
0
votes
1
answer
31
views
Synapse column store datetime encoding
I have a table in an Azure Synapse database. This table has a clustered columnstore index. It has a datetime column. The minimum value in this column is 2001-03-27 00:00:00 and the maximum is 2022-12-...
- 83k
1
vote
0
answers
235
views
Synapse Dedicated SQL Pool: temporary CREATE TABLE failed despite number of columns are well below the maximum limit
I am performing an UPSERT operation in a Synapse Dedicated SQL Pool.
The TARGET table has 394 column and I am trying to update the TARGET with 5 Unique Keys.
MERGE table_A AS TARGET using
(SELECT &...
- 131
0
votes
3
answers
880
views
Split intervals
I have two tables. Each holds some attributes for a business entity and the date range for which those attributes were valid. I want to combine these tables into one, matching rows on the common ...
- 24.7k
1
vote
1
answer
230
views
How to retain same FLOAT value after converting it to a VARCHAR in Azure Synapse
Consider the following example:
DROP TABLE dbo.TEST_FLOAT;
CREATE TABLE dbo.TEST_FLOAT (
AMOUNT FLOAT
);
INSERT INTO dbo.TEST_FLOAT (AMOUNT) VALUES (11546.25);
SELECT AMOUNT, CAST(AMOUNT AS ...
- 69
1
vote
2
answers
4k
views
How to get queries executed in Synapse SQL?
I need to find all the query executed on my DB in last 1Hr in Synapse workspace with SQL pool. Will apply my logic on top of the result set.
What's the right table/view to look for?
sys....
- 13k
2
votes
3
answers
2k
views
How to run legacy SSIS packages with Azure Synapse
I would like to know how to run an SSIS package from Azure Synapse Studio or whether it's at all possible. Apparently there is no support for SSIS runtime in Synapse but I suppose there should be a ...
- 10.4k
0
votes
0
answers
743
views
Azure Synapse - Need to have table access to View?
I've been trying to find information on this for quite some time but I couldn't find any confirmed results. I know that we can grant access to view without granting explicit access to the base table ...
- 1
8
votes
5
answers
9k
views
sys.partitions row count is badly wrong - how to correct this?
Querying sys.partitions can return an approximate row count for a table.
I've noticed that this is returning the same row count for all partitions, regardless of the actual content (even for empty ...
- 25.2k
2
votes
2
answers
757
views
Lock a table for a CTAS upsert in Azure SQL DataWarehouse
I have a type 2 dimension in Azure SQL Data Warehouse.
Essentially I am creating an interim table with
CREATE TABLE myDimension_temp
AS
SELECT
...
FROM myStagingTable;
etc
After the CTAS is ...
- 24.7k
2
votes
0
answers
211
views
Exactly-once FIFO queue in Synapse
Creating a queue table in SQL Server is a much-studied problem. However, I would like to implement one in Azure Synapse where many of the building blocks do not exists. Specifically
no table hints (...
- 24.7k
1
vote
0
answers
19
views
Getting insight into partitions of a table in Azure Synapse (similar to SQL Server) [duplicate]
I'm using Dedicated SQL-Pools AKA Azure Synapse (which is different from serverless/on-demand Synapse that comes with Azure Synapse Analytics). And According to Azure:
While the syntax of ...
- 149
1
vote
0
answers
15
views
Resource overlap between Synapse databases
I have an Azure Synapse dedicated pool with a single database. It is scaled to DW500c which the documentation says means it has a single compute node.
If I add a second database how does work against ...
- 24.7k
0
votes
1
answer
3k
views
Create an Azure Synapse temp table from a SELECT with ORDER BY
I have the following statement that works when I omit the ORDER BY clause, or if I run it as a select and omit the create table part, but I need both to ensure my generated key is sequenced correctly
...
- 83k
0
votes
1
answer
1k
views
Alter column fails due to "hidden" statistic
I'm trying to change a column data type from datetime2 to datetimeoffset. I have db owner permissions.
Whenever I run the query:
alter table dbo.<my-table>
alter column [TimeStamp] ...
- 1
0
votes
1
answer
72
views
Can the Data Export Service in Microsoft Dynamics export data to an Azure Synapse Data Warehouse?
I am able to use the Data Export Service (DES) to export data to an Azure SQL Database. When I try to create a new profile in DES that connects to a Data Warehouse (aka Azure Synapse Analytics) on the ...
- 103
0
votes
1
answer
3k
views
Getting error USE statement is not supported to switch between databases with Azure Synapse formerly SQLDW
Whenever I attempt to submit a query to Azure Synapse SQLDB (or try to do anything with the database from my application called DBForge) I get the following error message:
USE statement is not ...
- 10.9k
8
votes
1
answer
637
views
What cases benefit from the Reduce, Replicate, and Redistribute join hints?
The From Clause Documentation starting with SQL Server 2008 briefly mention 3 join hints and their basic mechanisms:
Reduce
Replicate
Redistribute
However there does not seem to be much information ...
CommunityBot
- 1
1
vote
0
answers
36
views
Implementing data warehouse on the cloud [closed]
I need to implement a data warehouse on the cloud for a mid-sized company. The database size will be around 200 Gb.
My options are (so far):
AWS with its database Redshift
Azure with its database ...
- 51
1
vote
0
answers
58
views
Shrinking 150 TB data warehouse instance is feasible option?
We are using azure SQL data warehouse(azure synapse analytics) with size of 150 TB among which 75 TB is used and we are planning to shrink database with help of MS. What are the challenges should we ...
- 1,353
2
votes
1
answer
929
views
How to ignore columns in parquet/polybase import?
I'm using polybase to import a parquet file.
Over time, it is likely we may add or remove named columns in the file.
When I add an additional column, I get the below error:
External file access ...
- 10.4k
1
vote
1
answer
818
views
How to prevent Dropping of tables but allow Creating of them, within a Schema
Is it possible to, within a specific Schema, allow a user to create a table, and select from it, but not allow them to Delete or update rows after initial creation, and also prevent them from dropping ...
- 473
0
votes
0
answers
677
views
Best way to archive old data from SQL Azure?
I have an app that stores event data. We use SQL Azure. Right now it's very expensive. Over $800/month to host. Once the event is over, I want to move the data to a DB that has a lower cost. Thus this ...
- 585