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How to test for Absence of Duplicate Tuples in a subquery in oracle

819390Dec 18 2010 — edited Dec 18 2010
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SQL> select * from customer
2 where unique (select * from dual);
where unique (select * from dual)
*
ERROR at line 2:
ORA-00936: missing expression
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unique construct is not working in oracle .
Now how to check Absence of Duplicate Tuples

Edited by: 816387 on Dec 18, 2010 9:23 PM
This post has been answered by MichaelS on Dec 18 2010
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Locked on Jan 15 2011
Added on Dec 18 2010
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