Question

I am looking for a free/open source database which can properly store (multi-dimensional) arrays.

Once the array is stored in the database, the items in that array should be searchable within the database. This means, I don’t want to serialize it.

It should be able to run under Linux (SuSe), and I want to use it with Python and PHP.

Answer 1

In standard SQL, you can do

CREATE TABLE MyArray (
    RowIndex INTEGER,
    ColIndex INTEGER,
    Value    /* whatever type the array elements have */,
    UNIQUE (RowIndex, ColIndex)
);