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How to count instances of character in SQL Column
...CT LEN(REPLACE(col, 'N', ''))
If, in a different situation, you were actually trying to count the occurrences of a certain character (for example 'Y') in any given string, use this:
SELECT LEN(col) - LEN(REPLACE(col, 'Y', ''))
...
Showing Difference between two datetime values in hours
...e and another one with 75 seconds added to the current time. Then we will call the method .Subtract() on the second DateTime object. This will return a TimeSpan object.
Once we get the TimeSpan object, we can use the properties of TimeSpan to get the actual Hours, Minutes and Seconds.
DateTime star...
What is the recommended batch size for SqlBulkCopy?
...
As others have stated, it depends on your environment specifically the row volume and network latency.
Personally, I'd start with setting the BatchSize property to 1000 rows and see how that performs. If it works, then I keep doubling the number of rows (e.g. to 2000, 4000, etc.) unti...
Node.js quick file server (static files over HTTP)
Is there Node.js ready-to-use tool (installed with npm ), that would help me expose folder content as file server over HTTP.
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Any open source alternatives to balsamiq mockup [closed]
...rce alternatives to balsamiq mockup for prototyping. Anyone knows of an equally good alternative that's open source or basically freeware.
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SQL Server dynamic PIVOT query?
...edure is going to take in the key variables of a pivot statement to dynamically create pivot statements for varying tables, column names and aggregates. The Static column is used as the group by / identity column for the pivot(this can be stripped out of the code if not necessary but is pretty commo...
How to split a string, but also keep the delimiters?
...ve an obvious maximum length" trying to use this with a regex representing all real numbers.
– daveagp
May 28 '14 at 15:00
2
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What is the difference between the template method and the strategy patterns?
... client invokes methods of the template's external interface the template calls its abstract methods (its internal interface) as required to invoke the algorithm.
class ConcreteAlgorithm : AbstractTemplate
{
void DoAlgorithm(int datum) {...}
}
class AbstractTemplate
{
void run(int datum) {...
How do I obtain the frequencies of each value in an FFT?
...0 / 1024 = 22006.9 Hz
Note that for a real input signal (imaginary parts all zero) the second half of the FFT (bins from N / 2 + 1 to N - 1) contain no useful additional information (they have complex conjugate symmetry with the first N / 2 - 1 bins). The last useful bin (for practical aplications...
Recompile Heroku slug without push or config change
... took committing a space to the js file and a push to get the asset to actually recompile.
– Josh Diehl
Oct 14 '14 at 2:35
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