大约有 8,100 项符合查询结果（耗时：0.0166秒） [XML]
Fetch the row which has the Max value for a column
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select userid,
my_date,
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max(my_date) over (partition by userid) max_my_date
from users
)
where my_date = max_my_date
"Analytic functions rock"
Edit: With regard to the first comment ...
"using analytic queries and a self-join defeats the purpose of analytic queries"
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Detach many subdirectories into a new, separate Git repository
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Assuming you have tags in the mix, you should probably add --tag-name-filter cat to your parameters
– Yonatan
May 27 '15 at 19:03
16
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Overlaying histograms with ggplot2 in R
... readable answer, it gels more nicely with more complicated plots, such as mixed calls to aes() and aes_string().
– rensa
Apr 4 '16 at 3:41
2
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Accessing dict keys like an attribute?
... order to improve readability of his code I strongly recommend that he not mix his notation styles. If he prefers this notation then he should simply instantiate a dynamic object, add his desired attributes to it, and call it a day:
>>> C = type('C', (object,), {})
>>> d = C()
&g...
Haskell testing workflow
...s as a more modern example of how to deal with cabal test and cabal bench, mixing HUnit, doctest, and quickcheck based tests with criterion benchmarks. The code in speculation predates cabal test and cabal bench.
– Edward KMETT
Nov 2 '12 at 17:02
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When to use enumerateObjectsUsingBlock vs. for
Besides the obvious differences:
6 Answers
6
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List all of the possible goals in Maven 2?
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2. Compile
3. Test
4. Package
5. Verify
6. Install
7. Deploy
Note:
Don't mix or get confused with maven goals with maven lifecycle.
See Maven Build Lifecycle Basics1
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How can I make a weak protocol reference in 'pure' Swift (without @objc)
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My problem with this solutions is that calling the delegate causes a crash - EXC_BAD_ACCESS (as noted by others elsewhere). This seems to be bug. The only solution I have found is to use @objc and eliminate all Swift data types from the protocol.
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
... :$in style symbols show up a fair bit when using MongoDB so you'll end up mixing Hash styles if you use MongoDB. And, if you ever work with specific keys of Hashes (h[:k]) rather than just whole hashes (h = { ... }), you'll still have to use the colon-first style for symbols; you'll also have to us...
What is the difference between Strategy design pattern and State design pattern?
...rategy for every item on the list, but you do run across hybrids that have mixes of both. Whether a particular one is more State-y or Strategy-y is ultimately a subjective question.
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