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Declarative SQL: Using UNIQUE Constraints

In SQL, you can express the logic of what you want to accomplish without spelling out the details of how the database should do it. Nowhere is this more powerful than in constraints. In this introduction to Declarative SQL, Joe Celko demonstrates how you can write portable code that performs well and executes some complex logic, merely by creating unique constraints.

2015-12-15

6,149 reads

External Article

Exploration of SQL Server 2016 Always Encrypted – Part 1

With the introduction of SQL Server 2016 you now have a new way to encrypt columns called Always Encrypted. With Always Encrypted, data is encrypted at the application layer via ADO.NET. This means you can encrypt your confidential data with your .NET application prior to the data being sent across the network to SQL Server. In this article, Greg Larson explains his experience with exploring setting up a table that stores always encrypted data.

2015-12-14

3,661 reads

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Question of the Day

UNISTR Escape

In SQL Server 2025, I run this command:

SELECT UNISTR('*3041*308A*304C\3068 and good night', '*') as "A Classic";
What is returned? (assume the database has an appropriate collation) A: B: C:

See possible answers