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SQL Group By with an Order By
... all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
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SqlDataAdapter vs SqlDataReader
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Using Git with an existing Xcode project
... process, mostly pieced together from the other answers on this page/site. Order is very important here
Open terminal and cd into the directory containing the .xcodeproj file
git init
In finder enter the newly created .git folder (in the same directory as the .xcodeproj file). Find info/exclude, o...
Implement paging (skip / take) functionality with this query
... 2012 it is very very easy
SELECT col1, col2, ...
FROM ...
WHERE ...
ORDER BY -- this is a MUST there must be ORDER BY statement
-- the paging comes here
OFFSET 10 ROWS -- skip 10 rows
FETCH NEXT 10 ROWS ONLY; -- take 10 rows
If we want to skip ORDER BY we can use
SELECT col1, col...
How do I use reflection to invoke a private method?
...meters, or with too much parameters, or not enough... or even in the wrong order (this one my favourite :) ). By the way return type could change as well.
Reflection is slow.
Private members reflection breaks encapsulation principle and thus exposing your code to the following :
Increase complex...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
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The order of evaluation of subexpressions, including
the arguments of a function call and
operands of operators (e.g., +, -, =, * , /), with the exception of:
the binary logical operators (&& and ||),
the ternary con...
How to get next/previous record in MySQL?
...o cemkalyoncu's solution:
next record:
SELECT * FROM foo WHERE id > 4 ORDER BY id LIMIT 1;
previous record:
SELECT * FROM foo WHERE id < 4 ORDER BY id DESC LIMIT 1;
edit: Since this answer has been getting a few upvotes lately, I really want to stress the comment I made earlier about un...
List vs Set vs Bag in NHibernate
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NHibernate semantics:
List: Ordered collection of entities, duplicate allowed. Use a .NET IList in code. The index column will need to be mapped in NHibernate.
Set: Unordered collection of unique entities, duplicates not allowed. Use Iesi.Collection.ISe...
Does Python have an ordered set?
Python has an ordered dictionary . What about an ordered set?
14 Answers
14
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Optimizing away a “while(1);” in C++0x
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The relevant issue is that the compiler is allowed to reorder code whose side effects do not conflict. The surprising order of execution could occur even if the compiler produced non-terminating machine code for the infinite loop.
I believe this is the right approach. The langu...