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When you code a union that combines two result sets, each result set must have the same number of columns?

When you code a union that combines two result sets, each result set must have the same number of columns?
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When you code a union that combines two result sets, each result set must have the same number of columns?

User Josh Rumbut
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I believe the answer is The result set must be derived from different tables. Hope I helped!
User Benjaminmgross
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