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What's the difference between identifying and non-identifying relationships?
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An identifying relationship is when the existence of a row in a child table depends on a row in a parent table. This may be confusing because it's common practice these days to create a pseudokey for a child table, but not make the for...
How to get a Docker container's IP address from the host
Is there a command I can run to get the container's IP address right from the host after a new container is created?
52 Ans...
Change default primary key in Eloquent
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Yes
class User extends Eloquent {
protected $primaryKey = 'admin_id';
}
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Reorder / reset auto increment primary key
I have a MySQL table with an auto increment primary key. I deleted some rows in the middle of the table. Now I have, for example, something like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows.
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Nesting await in Parallel.ForEach
In a metro app, I need to execute a number of WCF calls. There are a significant number of calls to be made, so I need to do them in a parallel loop. The problem is that the parallel loop exits before the WCF calls are all complete.
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Surrogate vs. natural/business keys [closed]
Here we go again, the old argument still arises...
19 Answers
19
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Only one expression can be specified in the select list when the subquery is not introduced with EXI
My query is as follows, and contains a subquery within it:
4 Answers
4
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Get user profile picture by Id
I'm now working on a web application which is mostly based of facebook graph api.
I hold some data about users - actually , the possible public data available - such as name and id.
I also know that a profile picture is a part of the public data, and I wondered how I'll be able to get a direct link ...
MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
as the title says, I want to perform a find (one) for a document, by _id, and if doesn't exist, have it created, then whether it was found or was created, have it returned in the callback.
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What are naming conventions for MongoDB?
Is there a set of preferred naming conventions for MongoDB entitites such as databases, collections, field names?
6 Answers...