Jeff Moden

  • Interests: SQL. When Im not having fun with that, then SQL. ;-)

SQLServerCentral Article

Skipping Columns (& other tricks) Using BCP Format Files (SQL Spackle)

BULK INSERT and BCP are powerful, high performance tools for importing text files. SQL Server MVP Jeff Moden gives us several nifty tips in this introduction to BULK INSERT and BCP Format Files including "Skipping Columns" and the sequestration of bad rows while still loading all the good data.

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2014-01-23

21,182 reads

SQLServerCentral Article

Tally OH! An Improved SQL 8K “CSV Splitter” Function

The Tally Table has proven to be a simple and elegant method for avoiding many varieties of RBAR. Unfortunately, one of its more common uses, that of a CSV splitter, has a well-known and serious performance problem. MVP Jeff Moden shows us what that problem is and how to correct it. (UPDATED with additional info and attachments on 5/12/2011).

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2012-12-28 (first published: )

132,532 reads

SQLServerCentral Article

Hierarchies on Steroids #2: A Replacement for Nested Sets Calculations

In this sequel to his first "Hierarchies on Steroids" article, SQL Server MVP Jeff Moden shows us how to build a pre-aggregated table that will answer most of the questions that you could ask of a typical hierarchy. Any bets on whether Santa is packin’ a Tally Table in his bag or not?

4.93 (29)

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2012-11-15

18,366 reads

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Question of the Day

Default Objects in Clones

On SQL Server 2022, I do this:

USE model
GO
CREATE TABLE dbo.DBALog
(logdate DATETIME2(3), logmsg VARCHAR(2000))
GO
I then create a new database:
CREATE DATABASE INVENTORY
GO
I install a new database application in here with multiple tables, views, etc. I do not run any queries. I then decide to run this code:
DBCC CLONEDATABASE(INVENTORY, Inventory_clone);
GO
What happens?

See possible answers