In SQL Server Integration Services, connection managers are used as gateways for most any external read and write operation. Connection managers are type- and format-specific, and in the case...
2019-09-24 (first published: 2019-09-16)
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SQL Server Integration Services is equipped with tasks and containers to make it easy to design and maintain the flow of ETL: which logic should be executed, when should...
2019-09-18 (first published: 2019-09-09)
467 reads
In SQL Server Integration Services, the lookup component is one of the most frequently used tools for data validation and completion. The lookup component is provided as a means...
2019-09-05
273 reads
SQL Server Integration Services is well designed for retrieving and processing data on the fly, directly in the data flow pipeline. However, there are circumstances that occasionally require the...
2019-09-03
35 reads
In the control flow for SQL Server Integration Services, the “lines” we commonly use to connect tasks to each other are actually smart controls. These SSIS precedence constraints allow...
2019-09-02
21 reads
One of the most common questions I am asked about ETL configuration is how much memory SSIS requires. When configuring a new instance of SQL Server running SSIS, or...
2019-05-02
205 reads
One of my favorite recent additions to SQL Server is the ability to use temporal tables to retain change history. As I wrote in an earlier post on this...
2019-04-02
139 reads
Change detection is a critical component of any system that moves data from one structure to another. Most data movement...
2019-03-22
398 reads
Change detection is a critical component of any system that moves data from one structure to another. Most data movement mechanisms are designed to move a subset of the...
2019-03-22
10 reads
For organizations using SQL Server 2012 and newer, the SSIS catalog is the ideal tool for storing, executing, and monitoring...
2019-03-05
802 reads
I’ve been thinking a lot lately about what it actually takes to make an...
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
I’ve uploaded the slides for my Techorama session Microsoft Fabric for Dummies and my...
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We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers