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Find rows that have the same value on a column in MySQL
...LECT email,
count(*) AS c
FROM TABLE
GROUP BY email
HAVING c > 1
ORDER BY c DESC
If you want the full rows:
select * from table where email in (
select email from table
group by email having count(*) > 1
)
...
Python list directory, subdirectory, and files
I'm trying to make a script to list all directory, subdirectory, and files in a given directory.
I tried this:
7 Answers
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What does “connection reset by peer” mean?
...cognize the connection; it will send back a packet with the RST bit set in order to forcibly close the connection.
This can happen if the other side crashes and then comes back up or if it calls close() on the socket while there is data from you in transit, and is an indication to you that some o...
Java Swing revalidate() vs repaint()
...ent to repaint itself. It is often the case that you need to call this in order to cleanup conditions such as yours.
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How can I pass a Bitmap object from one activity to another
...ated from an url String. The Bitmap creation requires a separate thread in order to avoid Application Not Responding (ANR) errors.
Concepts Used
Kotlin Coroutines notes.
The Loading, Content, Error (LCE) pattern is used below. If interested you can learn more about it in this talk and video.
Live...
How to run Gulp tasks sequentially one after the other
...nt before. It's a better solution to have independent tasks and decide the order of execution with an external tool.
– AxeEffect
May 17 '17 at 16:52
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source of historical stock data [closed]
...hat will not get you very far.
Then, if you need the real stuff (level II order book, all ticks as they have happened at all exchanges) one "affordable", yet excellent option is Nanex. They'll actually ship you a drive with terabytes of data. If I remember right its about $3k-4K per year of data. B...
How to convert ActiveRecord results into an array of hashes
...d objects to Ruby Hashes despite its name
tasks_records = TaskStoreStatus.all
tasks_records = tasks_records.as_json
# You can now add new records and return the result as json by calling `to_json`
tasks_records << TaskStoreStatus.last.as_json
tasks_records << { :task_id => 10, :sto...
How do I convert Long to byte[] and back in java
... doing cross-language or cross-platform, then sending the bytes in a known order is important. This method does that (it writes them "high byte first") according to the docs. The accepted answer does not (it writes them in the "current order" according to the docs). The question states that he wa...
Overload with different return type in Java?
...od overloading. Try it. Same method name, same parameter types in the same order, different return types. Won't compile.
– Oded
Jul 6 '17 at 19:17
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