ORA-00923: FROM keyword not found where expected -

ora 923ORA-00923: FROM keyword not found where expected Below is the SQL : SELECT A.Agent_key, Sum(Total_Orders) FROM (SELECT A.Agent_key, Sum(Total_Orders)Ora923 agen resmi pemberi maxwin tiada banding, situs resmi dengan beraneka macam bonus mingguan daftar sekarang dalam situs Ora 923.