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implement EXISTS or NOT EXISTS operator in reporting
I would like to have the possibility to use in reporting the sql EXIST operator available.
I don't like to write manual sql because of manteniance and portability or use other shortcuts or alternative to implement the sql EXIST logic for example using IN or JOIN.
They are not the same especially in terms of performance.
I suggest to put this possibility as an advanced option inside the JOIN in reporting toolbox or another kind of operator togheter with other already available( JOIN and set operators UNION,except,intersect)...
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