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Better Ways to Build a Database

The purpose of a database build is simple: prove that what you have in version control can successfully create a working database, and yet many teams struggle with unreliable and untested database build processes that slow down deployments and prevent the delivery of new functionality. Grant Fritchey explains how to achieve an automated and reliable database build that is only as complex as the database system it needs to create.

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SQL Server Integration Services SSIS Package Configuration

As you develop, test and deploy SSIS packages, you need to specify different parameter values for things like database connection strings, file and folder paths, etc. without having to edit the individual SSIS packages to make these changes. Ray Barley looks at how you can accomplish this goal by taking advantage of the configuration capabilities that SSIS provides, in particular the SQL Server package configuration.

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Question of the Day

The string_agg function

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;

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