Benjamin Nevarez

Benjamin Nevarez is a database professional based in Los Angeles, California. He has more than 15 years of experience with relational databases and has been working with SQL Server since version 6.5. Benjamin has been the technical editor of the two latest Kalen Delaney’s books including “SQL Server 2008 Internals”. He holds a Master’s Degree in Computer Science and has been a speaker at several technology conferences, including the PASS Community Summit. you can read Benjamin’s blog at www.benjaminnevarez.com.

SQLServerCentral Article

Inside the SQL Server Query Optimizer

This book will take you from the fundamentals of Statistics, Cost Estimation, Index Selection, and the Execution Engine, and guide you through the inner workings of the Query Optimization process, and throws in a pragmatic look at Parameterization and Hints along the way.

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2017-02-06

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Question of the Day

Multiple Sequences

In SQL Server 2022, I run this code:

CREATE SEQUENCE myseqtest START WITH 1 INCREMENT BY 1;
GO
CREATE TABLE NewMonthSales
  (SaleID    INT
  , SecondID int
 , saleyear  INT
 , salemonth TINYINT
 , currSales NUMERIC(10, 2));
GO
INSERT dbo.NewMonthSales
  (SaleID, SecondID, saleyear, salemonth, currSales)
SELECT
  NEXT VALUE FOR myseqtest
, NEXT VALUE FOR myseqtest
, ms.saleyear
, ms.salemonth
, ms.currMonthSales
FROM dbo.MonthSales AS ms;
GO
SELECT * FROM dbo.NewMonthSales AS nms

Assume the dbo.MonthSales table exists. If I run this, what happens?

See possible answers