If I introduce a value in an empty column from a table (let's say I put the value '5' in the column 'number1' from 'tabel1') when I introduce another value in another empty column from the same table (let's say I put the value '9' in the column 'number2'),
it is introduced in the second row.
The main problem is that when i read the value form the column 'number2' it gives me the NULL value. I suppose that it gives me the NULL value because the whole first row has a single value, and that one is '5' form the column 'number1', so the other values
from the first row, as the value '9' from the column 'number2' receive the Nul ...
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