Removing duplicate rows from table in Oracle -


i'm testing in oracle , populated table sample data, in process accidentally loaded duplicate records, can't create primary key using of columns.

how can delete duplicate rows , leave 1 of them?

use rowid pseudocolumn.

delete your_table rowid not in (select min(rowid) your_table group column1, column2, column3);

where column1, column2, , column3 make identifying key each record. might list columns.


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