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The SQL OVER() clause - when and why is it useful?

...nd you would be able to see how it works. Assuming you have the following table DIM_EQUIPMENT: VIN MAKE MODEL YEAR COLOR ----------------------------------------- 1234ASDF Ford Taurus 2008 White 1234JKLM Chevy Truck 2005 Green 5678ASDF Ford Mustang 2008 ...
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Is there a performance impact when calling ToList()?

...ntees that the file amount in the folder is always small, the code is acceptable. But it's still suggested to use a lazy version: Directory.EnumerateFiles in C#4. This is much more like a query, which will not be executed immediately, you can add more query on it like: Directory.EnumerateFiles(myP...
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Appending a vector to a vector [duplicate]

... @Yakk In my draft C++14 standard, Table 100 (Sequence Container Requirements) lists as a precondition of the call a.insert(p, i, j) that "i and j are not iterators into a." – templatetypedef Oct 30 '14 at 18:36 ...
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How does the const constructor actually work?

... time. They are canonicalized at compile time and stored in special lookup tables (where they are hashed by their canonical signatures) from which they are later reused. P.S. The form #Foo#int#1#int#1 used in these samples is only used for comparison purposes and it is not a real form of canonical...
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What is the fastest integer division supporting division by zero no matter what the result is?

...y accessible in C through using idiom. That is why it so hard to make a portable multiple precision integer library in C without resorting to (inline) assembly. My guess is that most decent compilers will understand the above idiom. Another way of avoiding branches, as also remarked in some of the ...
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Should I use PATCH or PUT in my REST API?

...group id} { "attributes": { "status": "deleted" } } response: 406 Not Acceptable Replacing the resource, without side-effects use PUT. PUT /groups/{group id} In case you wish to replace an entire Group. This does not necessarily mean that the server actually creates a new group and throws the ol...
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What is a deadlock?

...s much as you can. In databases avoid making lots of changes to different tables in a single transaction, avoid triggers and switch to optimistic/dirty/nolock reads as much as possible. share | imp...
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Error message “Forbidden You don't have permission to access / on this server” [closed]

...turn index_directory(r, d); } else { const char *index_names = apr_table_get(r->notes, "dir-index-names"); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01276) "Cannot serve directory %s: No matching DirectoryIndex (%s) found, and " ...
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ERROR 2006 (HY000): MySQL server has gone away

... changes to /etc/my.cnf file as well as appending those flags, some of the tables were missing after the import. System used: OSX El Capitan 10.11.5; mysql Ver 14.14 Distrib 5.5.51 for osx10.8 (i386)
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PHP exec() vs system() vs passthru()

...egardless, I suggest you not use any of them. They all produce highly unportable code. share | improve this answer | follow | ...