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MySQL INNER JOIN select only one row from second table
... user, those of which have payments, may have multiple associated payments in the payments table. I would like to select all users who have payments, but only select their latest payment. I'm trying this SQL but i've never tried nested SQL statements before so I want to know what i'm doing wrong. ...
MySQL join with where clause
I have two tables I want to join.
2 Answers
2
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A generic list of anonymous class
In C# 3.0 you can create anonymous class with the following syntax
22 Answers
22
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What is the most efficient way to store tags in a database?
I am implementing a tagging system on my website similar to one stackoverflow uses, my question is - what is the most effective way to store tags so that they may be searched and filtered?
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Immutable vs Mutable types
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What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut" x?
Well you agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it changes by changing what the ...
Do DOM tree elements with ids become global variables?
Working on an idea for a simple HTMLElement wrapper I stumbled upon the following for Internet Explorer and Chrome :
5 An...
Entity Framework - Invalid Column Name '*_ID"
...ure how to fix it. I'll try to be as clear as I can, but I honestly am missing some of the understanding here myself. This is Entity Framework 4.4
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Postgres unique constraint vs index
As I can understand documentation the following definitions are equivalent:
8 Answers
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What's Mongoose error Cast to ObjectId failed for value XXX at path “_id”?
When sending a request to /customers/41224d776a326fb40f000001 and a document with _id 41224d776a326fb40f000001 does not exist, doc is null and I'm returning a 404 :
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How do I make a checkbox required on an ASP.NET form?
I've done some searching on this, and I've found several partial answers, however nothing that gives me that warm fuzzy "this is the right way to do this". To answer the most frequently occurring complaint against this question: "checkboxes can have two legitimate states - checked and unchecked", th...