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I'm just wondering why you would go to the trouble of specifying relationships between tables.
Is it just for referential integrity?
Ensuring integrity ON THE SERVER has several obvious advantages I can think of:
- it will always be faster than if done by the client (no roundtrips)
- it will protect against developer errors
- you can't always control which client connects to your data
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Exact difference between SQL and no SQL injection.
NoSQL injection attack can take place on the application layer.
Application layer is the difference.
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I am curious if one can see the internal mechanism of merge join or any other join sql?
For Oracle have a look at this document: Database SQL Tuning Guide - Joins
If you are thinking about how they work, you can look it up here, it's a great representation of it.
If you are thinking about the code behind it, I think you'll have to work for MS to access it ;)
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While testing Elastic Scale I wanted to start over a couple of times without deleting the complete databases. Since this might save you some time I though I would share the following SQL to cleanup databases used for Elastic Scale Shards and the ShardMapsManager.
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Hey guys. I have a quick question to understand what this means for my project. I am supposed to have my usernames be unique (and enforced at a database level). What does this mean when referring to database level? I am using ASP.net MVC5 with SQL Express as my database.
You are supposed to make certain only unique names are in the database, so you can look at this for more
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/f7ded633-5d66-4cda-a525-96ab97cee868/sqlexpress-create-unique-column
Basically do
Alter table users add constraint uniq_user unique(username)
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Is it possible for two customers(users) to have a videochat, so the others only can watch them? Something similar to Deeyoon.com. Deeyoon don't use webrtc.
You should handle this logic by your own.
You can create the peer connection between the speakers. And, also send both these two streams to server.
For all other users, you can just pass these streams. (In this part, you don't need to create a peerview connection)