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SQL Server 2008: How to query all databases sizes?
...er_files F
INNER JOIN sys.databases D ON D.database_id = F.database_id
ORDER BY SizeInBytes desc
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Fixing the order of facets in ggplot
...e) to facet_grid(.~size_f)
Then plot:
The graphs are now in the correct order.
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Why does changing the sum order returns a different result?
Why does changing the sum order returns a different result?
6 Answers
6
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How do I convert between big-endian and little-endian values in C++?
...s with plain integers as these may or not may be in the host machines byte-order. You can get little-endian floats on big-endian machines and vice versa.
Other compilers have similar intrinsics as well.
In GCC for example you can directly call some builtins as documented here:
uint32_t __builtin...
oracle group 取每组第一条 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...CT * FROM(
SELECT z.type , z.code ,ROW_NUMBER()
OVER(PARTITION BY z.type ORDER BY z.code) AS code_id
FROM group_info z
)
WHERE code_id =1;
这里涉及到的over()是oracle的分析函数。
参考sql reference文档：
Analytic functions compute an aggregate value based on a group of ...
How can you customize the numbers in an ordered list?
How can I left-align the numbers in an ordered list?
16 Answers
16
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...he output, and GROUP BY by default does. However, in MySQL even a DISTINCT+ORDER BY might still be faster than a GROUP BY due to the extra hints for the optimizer as explained by SquareCog.
– rustyx
Jan 25 '15 at 15:03
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rsync copy over only certain types of files using include option
...*" --include="*.sh" "$from" "$to"
For rsync version 3.0.6 or higher, the order needs to be modified as follows (see comments):
rsync -zarv --include="*/" --include="*.sh" --exclude="*" "$from" "$to"
Adding the -m flag will avoid creating empty directory structures in the destination. Tested in ...
Returning 'IList' vs 'ICollection' vs 'Collection'
...erface.
IList<T> is essentially an ICollection<T> with random order-based access.
In this case you should decide whether or not your results require list semantics such as order based indexing (then use IList<T>) or whether you just need to return an unordered "bag" of results (t...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...#sortBy method accepts a function A => B where B is required to have an Ordering. Ordering is a type-class. Think best of both worlds: Like Comparable, it's implicit for the type in question, but like Comparator, it's extensible and can be added retrospectively to types that did not have it. Sinc...