Indexes

How Bad are Bad Page Splits – The Rest of the Story

  • Article

In Part 1 of this article we looked at a specific use case (probably exaggerated) that gave us an idea about how CPU and IO performance might be affected by a bad page split. We continue this analysis looking at what really happens to the data on the leaf pages of a clustered index with […]

4 (3)

2020-07-02

3,663 reads

“Included columns” for non-clustered indexes explained

  • Article

Microsoft SQL Server has the feature to use “Included columns” for the creation of non-clustered indexes. This feature and its benefits and disadvantages will be explained in the following article. Included columns can be used to create a covering indexes without including all the data into the key columns. This covering index has the advantage […]

4.17 (6)

2019-09-17

7,003 reads

Some T-SQL INSERTs DO Follow the Fill Factor! (SQL Oolie)

  • Article

With origins from the world of “Submarine ‘Dolphin’ Qualification” questions, an “Oolie” is a difficult question to answer, or the knowledge or fact needed to answer such a question, that may or may not pertain to one's duties but tests one's knowledge of a system or process to the limit. Introduction Contrary to what many […]

5 (9)

2019-08-08

5,034 reads

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Daily Coping 18 Sep 2020

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I started to add a daily coping tip to the SQLServerCentral newsletter and to...

Optimize for Unknown for Inline Table-Valued Functions

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I had a curious performance issue today. An inline table-valued function (iTVF) was performing...

Daily Coping 17 Sep 2020

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I started to add a daily coping tip to the SQLServerCentral newsletter and to...

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SQL 2017 MLS - cant add new python packages

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Hi I'm new-ish to MLS and have been trying to add new python packages...

Find row closest to date

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Just having trouble getting this to work as I hoped. Trying to extract entire...

SQL Query - FULL JOIN multiple tables but return NULL results

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Good day! Need help with my sql query code; first FULL JOIN "ILEtransfer" no...

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