What is diff between union / union all

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Mahipal Rawat

  • Mar 20th, 2006
 

Union- From both table only the unique record will come

Union All- In this case duplicate record will also come

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ramanareddy devarapalli

  • Jun 18th, 2007
 

UNION does it will not allows duplicate value, where as UNION ALL allows the duplicate values.

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