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Non-Stop Learning

There was a recent discussion in the forums here at SQL Server Central regarding the difficulties presented by the constantly shifting technology landscape. The core question was, how on earth do you master stuff? Especially, how do you master things when they're both new and constantly changing? Honestly, you don't. I mean, you can, but […]

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Optimize Your SQL by Reformulating the Spec

As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.

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An Unusual Identity

By Steve Jones - SSC Editor

Comments posted to this topic are about the item An Unusual Identity

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Question of the Day

An Unusual Identity

What values are returned when I run this code?

CREATE TABLE dbo.IdentityTest2
(
     id NUMERIC(10,0) IDENTITY(10,10) PRIMARY KEY,
     somevalue VARCHAR(20)
)
GO
INSERT dbo.IdentityTest2
(
    somevalue
)
VALUES
( 'Steve')
, ('Bill')
GO
SELECT top 10
 id
 FROM dbo.IdentityTest2

See possible answers