diff --git a/wwwroot/billing.dspy b/wwwroot/billing.dspy
index 89df46c..d9f426a 100644
--- a/wwwroot/billing.dspy
+++ b/wwwroot/billing.dspy
@@ -22,7 +22,7 @@ async with get_sor_context(request._run_ns, 'accounting') as sor:
 d.amount, d.balance, s.name as subject_name
 from acc_detail d
 join account a on d.accountid = a.id COLLATE utf8mb4_unicode_ci
-join subject s on a.subjectid = s.id COLLATE utf8mb4_unicode_ci
+left join subject s on a.subjectid = s.id COLLATE utf8mb4_unicode_ci
 where a.orgid = ${orgid}$
 	and d.acc_date >= ${start_date}$
 	and d.acc_date <= ${end_date}$"""