What are the basic requirements for union set operation? 1.Tables must be union incompatible 2.Tables must have same no of columns 3.Each column must have same type of data 4.Union set operation between 2 union compatible tables excludes the duplicate rows
What are the basic requirements for union set operation? 1.Tables must be union incompatible 2.Tables must have same no of columns 3.Each column must have same type of data 4.Union set operation between 2 union compatible tables excludes the duplicate rows
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