I have a table of 8 columns where 'employee' is a primary key in that table. When I am trying to retrieve the rows using primary key, I am not getting any results even there is data in the table. My query is "select * from employees_table where employee = '1028'. The table has a record of 1028. when I am trying to retrieve using primary key , I am getting empty results. Why I am getting empty results? It works when I tried to use other columns but not working with the primary key. Please explain me the reason. Please help me.