Today I am going to describe the Difference Between Union And Union All in Oracle Database . The Union is an Operator that is used to combine two or more select statement data into a single unit or display a single result. Union removes duplicate data from the result set while Union All is also an Operator that is used to combine two or more select statement data into a single unit or display a single result. Union All do not remove duplicate data from the result set. Let's Start Today Topic. What is the Union Operator in Oracle Database ? What is the Union All Operator in Oracle Database ? Basic Difference between Union and Union All in Oracle Database What is the Union Operator in Oracle Database ? The Union is an Operator that is used to combine two or more select statement data into a single unit or display a single result. Union removes duplicate...