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PL-SQL - What is the difference between join and union?




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asked mar February 12, 2015 12:30 AM  

What is the difference between join and union?


           

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join: 1. Join the columns.

  1. Duplicate are allowed

  2. Combine the column based on condition.

union: 1.Merge the row

2.Duplicates are not allowed

  1. Combine the result of two select statements.
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