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Refacerea datelor dintr-o coloana a unei tabele Oracle setata ca unused se face:
Prin crearea din nou a coloanei cu comanda ALTER TABLE, urmata de inserarea datelor preluate dintr-o tabela in care s-au salvat anterior
Setand coloana respectiva ca used cu comanda ALTER TABLE
Executand comanda ROLLBACK, inainte de a se executa comanda COMMIT
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