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By Datakey
via datakeyword.blogspot.com
Submitted: Jul 16 2013 / 22:55

In Java development, we may encounter the complex set operations. Java alone is not powerful enough to save programmers’ efforts in implementing the computation details, which is time-consuming and poor in code reuse. In view of this, programmers usually resort to dynamic calculation script for set operation. SQL is surely the first kind of script that comes into most programmers’ mind. However, to their disappointments, SQL does not support the explicit set, and is unable to represent the sets of a set, ordered set, generic set, and only the result set can be recognized as a set...
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