how to remove duplicate values in postgresql code example

Example 1: query postgres delete duplicates

DELETE FROM dups a USING (
      SELECT MIN(ctid) as ctid, key
        FROM dups 
        GROUP BY key HAVING COUNT(*) > 1
      ) b
      WHERE a.key = b.key 
      AND a.ctid <> b.ctid

Example 2: query to remove duplicate records in postgresql server

DELETE FROM
    basket a
        USING basket b
WHERE
    a.id < b.id
    AND a.fruit = b.fruit;

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