Oracle ROLLUP - Oracle Tutorial
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//OracleROLLUPSummary:inthistutorial,youwilllearnhowtousetheOracleROLLUPextensiontogeneratereportsthatcontainsubtotalsandtotals.GettingstartedwithOracleROLLUPConsiderthefollowingordersandorder_itemstablesinthe:Thefollowingreturnsthesalesrevenuebycustomersintheyearof2017.Itcalcu
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