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How to check if a Constraint exists in Sql server?
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Just something to watch out for......
In SQL Server 2008 R2 SSMS, the "Script Constraint as -> DROP And CREATE To" command produces T-SQL like below
USE [MyDatabase]
GO
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[DEF...
How to get share counts using graph API
... "388265801869",
"description": "Get a first look at iPhone 7, Apple Watch Series 2, and the new AirPods \u2014 the future of wireless headphones. Visit the site to learn more.",
"title": "Apple",
"type": "website",
"updated_time": "2016-09-20T08:21:03+0000"
},
"share":...
Understanding the transclude option of directive definition?
...ng a directive.
My code example is here.
You could also benefit from watching this.
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Facebook database design?
...the Social Graph
TAO: The power of the graph.
I really recommend you to watch the presentation of the first link above before continue reading. It's probably the best explanation of how FB works behind the scenes you can find.
The video and article tells you a few things:
They're using MySQL a...
Git and Mercurial - Compare and Contrast
...whatching those two videos:
Linus Torvalds on Git (http://www.youtube.com/watch?v=4XpnKHJAok8)
Bryan O'Sullivan on Mercurial (http://www.youtube.com/watch?v=JExtkqzEoHY)
Both of them are very similar in design but very different in implementations.
I use Mercurial. As far as I understand Git, one...
What is the difference between a stored procedure and a view?
... NOT accept parameters", it's not true? The video for example: youtube.com/watch?v=zK-mWjUxKpw
– xayer
Dec 21 '19 at 14:12
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What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...ion
write-host ("count=" + $count)
# or
write-host "count=$count"
BTW - Watch this video of Jeffrey Snover explaining how the pipeline works. Back when I started learning PowerShell I found this to be the most useful explanation of how the pipeline works.
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When to use in vs ref vs out
...ideo which demonstrates the difference practically https://www.youtube.com/watch?v=lYdcY5zulXA
Below image shows the differences more visually
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Do I set properties to nil in dealloc when using ARC?
...rectly (it must behave correctly if you pass it a nil value) and sometimes watch the order of deallocation.
– Sulthan
Mar 7 '12 at 21:23
7
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Postgres and Indexes on Foreign Keys and Primary Keys
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@juanitogan Watch the where clauses: Amongst others, it only takes tables into consideration which size is more than 9 MB.
– Matthias
Mar 29 '17 at 11:48
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