Databases are not arrays, although they may be implemented as arrays. The whole point of the relational model is that the logical model is abstracted from the i

Databases are not arrays, although they may be implemented as arrays. The whole point of the relational model is that the logical model is abstracted from the implementation. So if e.g. the DBA decides that it would be more efficient to store a table as an array of columns rather than an array of rows, he can do that without changing the logical model.