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1. What does the Union operator do?
Join a Group By and a Where Clause
Allows us to combine the results of two or more Select statements.
2. Can a Union Operator be used with columns of different data types?
3. How many columns must each Select Statement have in order to use Union?
Not more than two Columns each.
It Depends on the Statement.
All Select Statements must have the same number of columns.
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