A Database Error Occurred

Error Number: 1054

Unknown column 'm_content' in 'where clause'

select pa.attributevalue,sa.attributename,sa.attributepicurl,sa.inputvaluesort from product_attribute as pa,sort_attribute as sa where pa.sortattributeid=sa.id and pa.productid=m_content and sa.inputvaluesort='checkbox' and pa.attributevalue=1