Comcast Interview Question: What is the difference between union and union all | Glassdoor

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Comcast Software Development Engineer (SDE) interview

Comcast Interview Question

Software Development Engineer (SDE) Interview

What is the difference between union and union all

Interview Answer

Anonymous

Nov 4, 2024

Both are used to combine two or more queries. But the union will not allow the duplicate values. Union all will allow the duplicate values.

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