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Oracle “Partition By” Keyword
Can someone please explain what the partition by keyword does and give a simple example of it in action, as well as why one would want to use it? I have a SQL query written by someone else and I'm trying to figure out what it does.
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Add primary key to existing table
I have an existing table called Persion . In this table I have 5 columns:
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How to get index using LINQ? [duplicate]
Given a datasource like that:
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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
I am trying to add an unique index that gets created from the foreign keys of four associated tables:
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arrayfun can be significantly slower than an explicit loop in matlab. Why?
Consider the following simple speed test for arrayfun :
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Why would an Enum implement an Interface?
I just found out that Java allows enums to implement an interface. What would be a good use case for that?
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How can you iterate over the elements of an std::tuple?
How can I iterate over a tuple (using C++11)? I tried the following:
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Variable number of arguments in C++?
How can I write a function that accepts a variable number of arguments? Is this possible, how?
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In what order do static/instance initializer blocks in Java run?
Say a project contains several classes, each of which has a static initializer block. In what order do those blocks run? I know that within a class, such blocks are run in the order they appear in the code. I've read that it's the same across classes, but some sample code I wrote disagrees with t...
How do I select a random value from an enumeration?
Given an arbitrary enumeration in C#, how do I select a random value?
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