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How do I (or can I) SELECT DISTINCT on multiple columns?

I need to retrieve all rows from a table where 2 columns combined are all different. So I want all the sales that do not have any other sales that happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status. ...
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Enum “Inheritance”

I have an enum in a low level namespace. I'd like to provide a class or enum in a mid level namespace that "inherits" the low level enum. ...
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How can I extract all values from a dictionary in Python?

...edited Feb 18 '16 at 18:02 Erik Giberti 1,18588 silver badges1111 bronze badges answered Aug 9 '11 at 20:23 Pi...
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Case in Select Statement

I have an SQL statement that has a CASE from SELECT and I just can't get it right. Can you guys show me an example of CASE where the cases are the conditions and the results are from the cases. For example: ...
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Concatenate two slices in Go

I'm trying to combine the slice [1, 2] and the slice [3, 4] . How can I do this in Go? 7 Answers ...
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How To Get IPython Notebook To Run Python 3?

...on Notebook to run Python 3 instead of 2 on my MAC 10.9, I did the following steps $ sudo pip3 install ipython[all] Then $ ipython3 notebook share | improve this answer | ...
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Find and replace Android studio

... and replace all occurrences of a word in an entire project( not just a single class using refactor -> rename) and also maintain case, either in android studio or using a command line script? ...
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What does the “at” (@) symbol do in Python?

I'm looking at some Python code which used the @ symbol, but I have no idea what it does. I also do not know what to search for as searching Python docs or Google does not return relevant results when the @ symbol is included. ...
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HTML5 best practices; section/header/aside/article elements

There is enough information about HTML5 on the web (and also on stackoverflow), but now I'm curious about the "best practices". Tags like section/headers/article are new, and everyone has different opinions about when/where you should use these tags. So what do you guys think of the following layout...
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EF LINQ include multiple and nested entities

Ok, I have tri-leveled entities with the following hierarchy: Course -> Module -> Chapter 5 Answers ...