title: Oracle SQL Join Eror
body: <p>This is my query. But I am getting following error.</p>
  <pre><code>Select customer_info.CUSTOMER_ID, customer_info.NAME, Customer_Hierarchy_API.Get_Description(Cust_Hierarchy_Struct_API.Get_Hierarchy_Id(CUSTOMER_ID)) 
  from CUST_ORD_CUSTOMER_ENT
  JOIN customer_info ON 
  customer_info.customer_id = cust_ord_customer_ent.customer_id;
  </code></pre>
  <blockquote>
  <p>ORA-00918: column ambiguously defined
  00918. 00000 -  &quot;column ambiguously defined&quot;
  *Cause:<br />
  *Action: Error at Line: 1 Column: 137</p>
  </blockquote>