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ORA-00979 not a group by expression
...le to understand why this happens: Imagine you have a database like this:
FOO BAR
0 A
0 B
and you run SELECT * FROM table GROUP BY foo. This means the database must return a single row as result with the first column 0 to fulfill the GROUP BY but there are now two values of bar to chose from....
Show Youtube video source into HTML5 video tag?
I'm trying to put a YouTube video source into the HTML5 <video> tag, but it doesn't seem to work. After some Googling, I found out that HTML5 doesn't support YouTube video URLs as a source.
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IN vs OR in the SQL WHERE Clause
... you want to know the performance difference between the following:
WHERE foo IN ('a', 'b', 'c')
WHERE foo = 'a' OR foo = 'b' OR foo = 'c'
According to the manual for MySQL if the values are constant IN sorts the list and then uses a binary search. I would imagine that OR evaluates them one by on...
Is there something like Annotation Inheritance in java?
...value = {ElementType.TYPE})
@Vehicle
public @interface Car {
}
@Car
class Foo {
}
You can then check if a class is annotated with Vehicle using Spring's AnnotationUtils:
Vehicle vehicleAnnotation = AnnotationUtils.findAnnotation (Foo.class, Vehicle.class);
boolean isAnnotated = vehicleAnnotation...
How do I check if a directory exists? “is_dir”, “file_exists” or both?
...name is taken, you should check both. There might be a regular file named 'foo', which would prevent you from creating a directory name 'foo'.
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How to compute the similarity between two text documents?
...swered Jan 17 '12 at 15:54
Fred FooFred Foo
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Run a batch file with Windows task scheduler
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This fixed a scheduled 'foo.cmd' task for me on Windows Server 2012. With 'Start in' set to 'C:\Foo\' the task failed with exit code error 0x8007001, but with 'Start in' set to 'C:\Foo' the task ran fine.
– Aaron
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Serialize form data to JSON [duplicate]
... @dev.pus: You might need to handle it in the [{"name":"username","value":"foo"}] format. Otherwise, you cannot handle multiple elements with the same name.
– Matthew Schinckel
Apr 26 '13 at 8:19
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How to concatenate two strings to build a complete path
...some path joining stuff like you do.
The thing is, both path like
/data/foo/bar
/data/foo/bar/
are valid.
If I want to append a file to this path like
/data/foo/bar/myfile
there was no native method (like os.path.join() in python) in shell to handle such situation.
But I did found a tr...
Stack Memory vs Heap Memory [duplicate]
...l the heap? What platform are you on, MS-DOS?
– Fred Foo
Apr 29 '11 at 19:33
3
@larsman But did y...