The DUAL is special one row, one column table present by default in all Oracle databases. We cannot insert, update, delete record in dual table. Dual means dummy. In the dual table only one column is ...

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Dual table:dual table is a dummy table whichcontains one row and one column andby default it is present indatabase.it contains a singlevarchar2(1) column known as dummywith a value "x".it can be ...