Which is Faster between UNION and UNION ALL? Why?

UNION ALL is always FASTER…!!! As we all know that, UNION and UNION ALL are the SET operators which combines/merges the multiple data sets data into a single data set. UNION eliminates the duplicates after combining the records. But UNION ALL ignores

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What is the major difference between UNION and UNION ALL?

UNION: Selects only distinct records First Selects all records and then takes distinct records from it Slower than UNION ALL UNION ALL: Selects all values from all the result sets. Duplicates will not be eliminated Selects all values from all the result

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