Write an SQL Query to
Delete Duplicate records from a table using ROWID.
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Answer Posted / bharath
1.SELECT ROWID FROM TABLE T1
WHERE ROWID NOT IN (SELECT MIN(ROWID)
FROM TABLE T2 WHERE T1.KEY=T2.KEY);
THIS QUERY IS USEFUL WHEN WE HAVE A KEY VAL.
2.
i.CREATE TABLE NEW AS SELECT DISTINCT * FROM OLD;
ii.DROP TABLE OLD;
iii.RENAME NEW TO ORIGINAL;
THIS IS WHEN WE APPLY TO DELETE DUPLICATE ROWS..
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