sql - Oracle maintaining a column based on the values of other columns in the same table -


in student table query create default constraint on column address value should updated automatically based on data of city+''+street+''+houseno.

well if column based on values in other columns not create new column @ redundant. construct value when query table.

you virtual columns means ensuring definition of constructed value consistent , indexed, however. http://docs.oracle.com/cd/b28359_01/server.111/b28279/chapter1.htm#featureno07254


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