SQLAdrian’s gists

SQLAdrian / IN versus JOIN performance SQL2022.sql

Last active April 17, 2024 03:23

IN versus JOIN performance SQL2022

	--Tested on 24 core @ 2.5GHz, SELECT cpu_count FROM sys.dm_os_sys_info;
	--Microsoft SQL Server 2022 Developer Edition (RTM-GDR) (KB5035432) - 16.0.1115.1 (X64)
	--I will be using the Estimate Subtree cost to compare each select statement.
	--Test carried out on E4 with 10,000 rows. It would be stated where more rows were used.
	--Lookup table is set to 80% of the size of the source table.

	--tl;dr.
	--It really depends.
	--Generally the IN() and JOIN perform similar. Tested to 1m rows.
	--IN() benefits greatly from appropriate indexes on 0 to 250k rows. More so than a JOIN. Surprisingly.

SQLAdrian / SQLNinjacat.sql

Created December 17, 2020 00:35

	/Adrian Sullivan - 2020/12/17 Ninjacat with polygons./
	/SVG drawn using Inkscape, export and conversion done using custom code./
	DECLARE @tt table(id int identity(0,1), label VARCHAR(50), gg GEOMETRY)
	SET NOCOUNT ON

	/Add a point. This point gets layered each time we need to skip/
	DECLARE @g geometry = 'POLYGON((-121.97087 37.372518,-121.97087 37.372518,-121.970863 37.372517,-121.970845 37.372515,-121.97087 37.372518))'

	DECLARE @i int = 1
	WHILE @i <= 660

SQLAdrian / Query Carbon Footprint.sql

Created October 12, 2020 21:05

	/*
	Core assumptions:
	1. All thigs being equal except for CPU usage
	2. Memory power consumption remains statatic
	3. Storage power consumption remains static
	4. Hyperthreading enabled
	5. Base CPU consumption remains static
	Refer to https://www.kompulsa.com/much-power-computers-consume/,
	Base Watt Usage of CPU = =IF([@Basefreq]<2.2,75,IF([@Basefreq]<3.2,60,50))
	6. CPU power usage per vCPU calculated as follows

SQLAdrian / Hassen Tagari Memory.sql

Last active August 14, 2020 09:27

In loving memory of Hassen Tagari. 08/20/1972 to 09/08/2020.

	/Adrian Sullivan - 2020/08/14 Memories with polygons./
	/*In loving memory of Hassen Tagari from Johannesburg, South Africa
	08/20/1972 to 09/08/2020

	A legend in the world of racing. Gone too young, too soon.
	You will be remembered and missed.
	May your legacy always live on and your soul rest in peace.
	*/

	DECLARE @tt table(id int identity(0,1), label VARCHAR(50), gg GEOMETRY)

SQLAdrian / Hassen Tagari Memory.sql

Created August 14, 2020 07:35

In loving memory of Hassen Tagari from Lenasia, South Africa 08/20/1972 to 09/08/2020. Verily we belong to Allah, and verily to Him do we return.

This file has been truncated, but you can view the full file.

	/Adrian Sullivan - 2020/08/14 Memories with polygons./
	/*In loving memory of Hassen Tagari from Lenasia, South Africa
	08/20/1972 to 09/08/2020
	If you read this, please say a prayer for him
	Verily we belong to Allah, and verily to Him do we return.

	إِنَّا لِلَّٰهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ‎
	ʾinnā li-llāhi wa-ʾinna ʾilayhi rājiʿūna
	*/

SQLAdrian / CV in SQL.sql

Created December 31, 2019 09:25

How I always imagined a SQL DBA CV to look

	/Resume of Adrian Sullivan - Senior SQL Database Administrator/

	-- =============================================

	-- Author: Adrian Sullivan

	-- Create date: 2014-02-17

	-- Description: Resume of Adrian Sullivan - Senior SQL Database Administrator

SQLAdrian / drawbrent.sql

Last active June 21, 2024 00:19

Let's draw Brent

	/Adrian Sullivan - 2019/11/15 Fun with polygons./
	/*Thanks to Michael J Swart for all the awesome work on color
	https://michaeljswart.com/
	*/

	DECLARE @tt table(id int identity(0,1), label VARCHAR(50), gg GEOMETRY)
	SET NOCOUNT ON

	DECLARE @g geometry = 'POLYGON((-121.97087 37.372518,-121.97087 37.372518,-121.970863 37.372517,-121.970845 37.372515,-121.97087 37.372518))'

Adrian Sullivan SQLAdrian