How get products id without 0 if product has attribute

[ArsalanAnsari]

Hi,

I want to get records from ps_stock_available without default "0" attribute if product has attribute. As you know in ps_stock_available table show's default attribute as 0

for example ...

id_product id_product_attribute
     1              0
     1              12
     1              13
     1              14
     2              0
     3              0
     4              0
     4              1
     4              2
     4              4

What i want is to get records by mysql query such as...

id_product id_product_attribute
    1                12
    1                13
    1                14
    2                0
    3                0
    4                1
    4                2
    4                4

Let me know if someone can help.