Sapreste dirmi per quale ragione mi estrae 45 volte lo stesso record dal db?

sql_0 = "SELECT C.GROU_LINE_ID, A.PROD_GROU_ID, A.PROD_ID, A.PROD_FILE_S, A.PROD_CODE, B.PDES_VALUE " & _
"FROM PRODUCTS A, PRODUCTS_DESC B, GROUPS C " & _
"WHERE A.PROD_CODE = " & cod & " AND A.PROD_GROU_ID = C.GROU_ID AND A.PROD_ID = B.PDES_PROD_ID AND B.PDES_LANG_ID = 1 AND A.PROD_STATUS ='0' " & _
"ORDER BY A.PROD_CODE"

Grazie