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Find the Sequence exist ot not in schema.

I am new to work on the data base.I want to know the Sequence is there are not in the data base.Please suggest any one as early as possible.
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select  * from USER_SEQUENCES WHERE sequence_name = 'Sequence_Name';
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FYI

 'Sequence_Name'should be in caps letters.



select  * from user_sequences WHERE sequence_name = 'SEQUENCE_NAME';
Answer is