Patryk Nowakowski

Patryk has been developing database applications for Bank Zachodni WBK (one of the major polish banks which is a part of Allied Irish Banks) for the past two years. His experience to date includes mostly SQL Server and .NET. He's also keen in MySQL, data warehousing and business intelligence,
actually the kind of man who's always in pursuit for something new and feels he doesn't know enough. Patryk also has a Master's degree in economics and is 25.

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ADO.NET - A Data Access Layer

by Patryk Nowakowski

SQLServerCentral.com

Developing applications for SQL Server usually results in a variety of access methods that the programmers use. A data access layer class, given to the developers, is usually seen as the best practice, but one that isn't usually implemented. In fact, in most software I've built, each developer uses his own method, or may cut and paste from another, but rarely is there a central access class. New Author Patryk Nowakowski brings us his solution using ADO.NET.

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2004-08-03

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Question of the Day

STRING_AGG's behavior

Executing the following script (Sql Server 2022), you get the table t0 with 10 rows:

CREATE TABLE t0
( id     INT PRIMARY KEY
, field1 VARCHAR(1000)
, field2 VARCHAR(MAX));
INSERT INTO t0
SELECT
  gs.value
, REPLICATE ('X', 1000)
, REPLICATE ('Y', 1000)
FROM generate_series(1, 10, 1) gs;
GO

What happens if you execute the following statements?

select STRING_AGG(field1, ';') within group (order by id)  from t0;

select STRING_AGG(field2, ';') within group (order by id)  from t0;

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Patryk Nowakowski

ADO.NET - A Data Access Layer

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Question of the Day

STRING_AGG's behavior