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Does Foreign Key improve query performance?
...the foreign key relationship already inforces that for you.
So this:
select p.ProductId, p.Name, c.CategoryId, c.Name AS Category
from Products p inner join ProductCategories c on p.CategoryId = c.CategoryIdwhere c.CategoryId = 1;
Becomes this:
SELECT p.ProductId, p.Name, c.CategoryId, c.N...
What are .NET Assemblies?
...Visual Web Developer, you can add a reference to an assembly explicitly by selecting the menu option Website, Add Reference, and selecting the name of the assembly that you need to reference. For example, adding a reference to the System.Messaging.dll assembly results in the web configuration file i...
How to get a subset of a javascript object's properties
... Is there any function to exclude only certain fields instead of selecting? so I have about 50 fields in my json and want everything except just 2 fields.
– Shrikant Prabhu
Jul 3 '18 at 1:01
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What exactly does git's “rebase --preserve-merges” do (and why?)
...her part. The differences with --preserve-merges concern which commits are selected for replay and how that replaying works for merge commits.
To be more explicit about the main differences between normal and merge-preserving rebase:
Merge-preserving rebase is willing to replay (some) merge commi...
difference between primary key and unique key
...ey, unique key, etc are collectively called as Candidate Key.
However, DBA selected a key from candidate key for searching records is called Primary key.
Difference between Primary Key and Unique key
1. Behavior: Primary Key is used to identify a row (record) in a table, whereas Unique-key is to...
Weighted random numbers
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if you have a bag of red and blue marbles and you select a red marble from it and don't replace it is the probability of selecting another red marble still the same? In the same way, your statement "Pick elements from the bag sequentially until it is empty" produces a totall...
printf format specifiers for uint32_t and size_t
...antic, then. It's probably going off the names of types in the source code and doesn't realize they're equivalent. I wonder what it would do with @KennyTM's answer... It certainly should be more portable.
– Cogwheel
Jul 2 '10 at 18:49
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AngularJS - how to get an ngRepeat filtered result reference
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Check this answer:
Selecting and accessing items in ng-repeat
<li ng-repeat="item in ..." ng-click="select_item(item)">
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improv...
jQuery how to bind onclick event to dynamically added HTML element [duplicate]
...ode. But here he was inserting the elements himself, and there is no clear selector for them (it's just an anchor, which there might be many of), so he would have to add additional markup to be able to target the element. In that case it's just as easy to attach the handler to the element directly, ...
How to uncheck a radio button?
...nt need the each function; you could just chain the removeAttr call to the selector.
– cjstehno
Jan 22 '10 at 13:55
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