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Codd's Rules

Frank gives us his take on Codd's Rules. If you're new to databases, this is the core theory that resulted in the development of RDBMS. If you're more experienced with databases, maybe now is a good time to return to the rules to see how you're doing!

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2003-12-10

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SQLServerCentral Article

Sequential Numbering

Needing to number rows with a sequential id is a pretty common request. Sometimes it's because the user hasn't made the transition to 'set based' thinking, sometimes it really is a valid request (more or less!). Greg provides several different techniques to help you achieve sequential numbering.

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2003-12-05

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Question of the Day

Multiple Values Inserted

I have this code on SQL Server 2022. What happens when it runs all at once?

DROP TABLE IF EXISTS dbo.Commission
GO
CREATE TABLE dbo.Commission
(id INT NOT NULL IDENTITY(1,1) CONSTRAINT CommissionPK PRIMARY KEY
, salesperson VARCHAR(20)
, commission VARCHAR(20)
)
GO
INSERT dbo.Commission
( salesperson, commission)
VALUES
( 'Brian', 12 ),
( 'Brian', 'None' )
GO
 

See possible answers