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Fetch the row which has the Max value for a column
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This will retrieve all rows for which the my_date column value is equal to the maximum value of my_date for that userid. This may retrieve multiple rows for the userid where the maximum date is on multiple rows.
select userid,
my_date,
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How to show git log history for a sub directory of a git repo?
...ne -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitignore
803fcc3 Initial Commit
s...
How to drop a database with Mongoose?
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Since all collections are in the hash mongoose.connection.collections, you might simply list them for ( collection in mongoose.connection.collections ) { mongoose.connection.collections[collection].drop } ... smth similar
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Markdown to create pages and table of contents?
...ample<a name="third-example" /> is the only way I could get it to swallow spaces so far. Surely the 3rd tag would be interpreted as - #Third - followed by a space - then the word Example - in your snippet above? Hyphens do not work at all. Thanks
– twobob
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jquery's append not working with svg element?
...you easy access to the namespaced methods needed to create SVG elements. Really jQuery isn't designed for use with SVG at all and many operations may fail.
HTML5 promises to let you use <svg> without an xmlns inside a plain HTML (text/html) document in the future. But this is just a parser ha...
What is the real overhead of try/catch in C#?
... to make here:
Firstly, there is little or NO performance penalty in actually having try-catch blocks in your code. This should not be a consideration when trying to avoid having them in your application. The performance hit only comes into play when an exception is thrown.
When an exception is th...
Can you “compile” PHP code and upload a binary-ish file, which will just be run by the byte code int
...depends on your host, but if I had to guess, I'd guess many hosts wouldn't allow it.
– Frank Farmer
May 21 '13 at 0:39
2
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Loader lock error
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If I run the project as Native debugging, with all exceptions on default (reset all), the debug window shows <mda:msg xmlns:mda="schemas.microsoft.com/CLR/2004/10/mda"> <!-- Attempting managed execution inside OS Loader lock.... etc --> <mda...
What is the precise meaning of “ours” and “theirs” in git?
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I suspect you're confused here because it's fundamentally confusing. To make things worse, the whole ours/theirs stuff switches roles (becomes backwards) when you are doing a rebase.
Ultimately, during a git merge, the "ours" branch refers to the branch you're merging into:
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
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They are essentially equivalent to each other (in fact this is how some databases implement DISTINCT under the hood).
If one of them is faster, it's going to be DISTINCT. This is because, although the two are the same, a query optimizer wo...