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MySQL “Group By” and “Order By”
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A simple solution is to wrap the query into a subselect with the ORDER statement first and applying the GROUP BY later:
SELECT * FROM (
SELECT `timestamp`, `fromEmail`, `subject`
FROM `incomingEmails`
ORDER BY `timestamp` DESC
) AS tmp_table GROUP BY LOWER(`fromEmail`)
This ...
How to set transform origin in SVG
...nsform uses the same notation as for SVGs, so the same six numbers in that order should work.
– Peter Collingridge
Aug 1 '14 at 11:17
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Best way to get InnerXml of an XElement?
...west methods being more than 3 times slower than the fastest.
The results ordered by fastest to slowest:
CreateReader - Instance Hunter (0.113 seconds)
Plain old System.Xml - Greg Hurlman (0.134 seconds)
Aggregate with string concatenation - Mike Powell (0.324 seconds)
StringBuilder - Vin (0.333 ...
Given a view, how do I get its viewController?
...ne point, a view has only one view controller. Being able to get to it in order to pass a message back to it, should be an automatic feature, not one where you have to work to achieve (by adding a property to keep track). One could say the same thing about views: why do you need to know who child...
How is Python's List Implemented?
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@sepp I believe lists in Python are just ordered collections; the implementation and/or performance requirements of said implementation are not explicitly stated
– NullUserException
Oct 12 '10 at 18:05
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How to crop an image in OpenCV using Python
...sand image loading if you do slicing. Whereas my code will still be on the order if MBs
– smttsp
May 17 at 13:15
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How to get cumulative sum
...om @t t1
inner join @t t2 on t1.id >= t2.id
group by t1.id, t1.SomeNumt
order by t1.id
SQL Fiddle example
Output
| ID | SOMENUMT | SUM |
-----------------------
| 1 | 10 | 10 |
| 2 | 12 | 22 |
| 3 | 3 | 25 |
| 4 | 15 | 40 |
| 5 | 23 | 63 |
Edit: this...
How do SQL EXISTS statements work?
...way:
For 'each' row from Suppliers, check if there 'exists' a row in the Order table that meets the condition Suppliers.supplier_id (this comes from Outer query current 'row') = Orders.supplier_id. When you find the first matching row, stop right there - the WHERE EXISTS has been satisfied.
The ...
Capture Signature using HTML5 and iPad
...es and how well it looks. One note about using it which helped me: add a border to the canvas so you can see how it is being adjusted. Also note that css changes to the canvas do some crazy things, so just specify a height and width in the canvas element if this get out of control.
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What is meant by the term “hook” in programming?
...For example, a function may be written to "hook" into the login process in order to execute a Captcha function before continuing on to the normal login process.
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