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What is true about the UNION operator ? returns rows from the combined queries along with NULL values returns rows for the combined queries ignoring
What is true about the UNION operator returns rows from the combined queries along with NULL values returns rows for the combined queries ignoring the NULL values returns rows for the combined queries along with duplicate values returns rows for the combined queries after eliminating duplicates
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Information Modeling And Relational Databases
Authors: Terry Halpin, Tony Morgan
2nd Edition
0123735688, 978-0123735683
