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The Practical Problems of Determining Equality and Equivalence in SQL

In theory, it is easy to determine whether data is equal to, greater than or lesser than a value. Real-world data types can be surprisingly tricky, even for gauging data equivalence. Because SQL cannot remain aloof from any application's data types, you need to be aware of the ways and pitfalls of individual datatypes and how you can test for equality, equivalence, similarity, identity and all that jazz. Joe Celko discusses.

2016-04-26

4,566 reads

External Article

Automatic SSRS report output of all report parameter combinations

You already have a SQL Server Reporting Services (SSRS) sales report that takes parameters for Country and State. Each time the report is run a user selects the specific Country and State for the report. A request has been made to deliver one report via email that includes all of the combinations for each country and state. Daniel Farina shows how to achieve this without modifying the report.

2016-04-22

4,408 reads

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UNISTR Escape

By Steve Jones - SSC Editor

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Celebrating Tomorrow

By Steve Jones - SSC Editor

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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