Answer:
For All SQL , Tested in PostgresSQL : Javedcc@gmail.com
SELECT * FROM <Table_Name> A
WHERE N = (SELECT COUNT(DISTINCT B.Column_Name ) FROM
<Table_Name> B WHERE A.Column_Name >= B.Column_Name)
SELECT * FROM <Table_Name> A
WHERE N = (SELECT COUNT(DISTINCT B.Column_Name ) FROM
<Table_Name> B WHERE A.Column_Name >= B.Column_Name)
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