(I\'m using C# but this isn\'t necessarily platform-specific) Say I have a table of values, which are indexed by a triplet of keys (A, B, C). The values in the table are streaming in from an outside
I\'m developing a Ruby on Rails app where one of my database tables has 10 columns (pile_1 through to pile_10). It would be convenient to access these columns in the model as a 10-element Array.
It is my understanding building a COM object aggregating an existing COM object implies implementing redirection logic in the IUnknown.QueryInterface method of the outer object.
If you\'re doing min/max/avg queries, do you prefer to use aggregation tables or simply query across a range of rows in the raw table?
This question relates to Django Aggregation/Annotation in 1.1.Suppose I have a simple model with an IntegerField that has a \"choices\" parameter passed to it.In this case, it maps to a GENDERS tuple
First I will have to apologise for my ignorance as I\'m sure this is a very simple question but I am very new to R. My question is that I have a data frame that looks like this;
Following up on my question summarizing-two-conditions-on-the-same-sql-table, I added a RATIO column that is simply one SUM(...) column divided by a second SUM(...) column:
I have a model called Item, 开发者_运维百科with m2m relation to User ("owner"). For each item, I need to count users who own it. That\'s easy enough with annotate()
Given a SQL table Transactions IDINT COMPANY_IDINT STATUSINT where STATUS IN (0,1) indicates a free transaction and STATUS IN (2,3) indicates a billable transaction, what simple (I hope) ANSI SQL s
I am trying to understand UML diagram describing Decorator Pattern at link below http://www.dofactory.com/Patterns/PatternDecorator.aspx
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