diff --git a/server/app/adminapi/logic/firstvisit/FirstVisitDoctorDashboardLogic.php b/server/app/adminapi/logic/firstvisit/FirstVisitDoctorDashboardLogic.php
index 77e18d604..8a2d44eaf 100644
--- a/server/app/adminapi/logic/firstvisit/FirstVisitDoctorDashboardLogic.php
+++ b/server/app/adminapi/logic/firstvisit/FirstVisitDoctorDashboardLogic.php
@@ -392,8 +392,8 @@ class FirstVisitDoctorDashboardLogic
             ->where('status', 2)
             ->where('amount', '>', 0)
             ->where('amount', '<', 10)
+            // payment_time 是 DATETIME NULL；MySQL 8 严格模式下不能与空字符串比较。
             ->whereNotNull('payment_time')
-            ->where('payment_time', '<>', '')
             ->whereBetweenTime(
                 'payment_time',
                 $startDate . ' 00:00:00',
diff --git a/server/app/adminapi/logic/stats/ConversionLogic.php b/server/app/adminapi/logic/stats/ConversionLogic.php
index cbcf6a429..d5d4b3813 100755
--- a/server/app/adminapi/logic/stats/ConversionLogic.php
+++ b/server/app/adminapi/logic/stats/ConversionLogic.php
@@ -1088,8 +1088,8 @@ class ConversionLogic
             ->alias('o')
             ->whereNull('o.delete_time')
             ->where('o.status', 2)
+            // payment_time 是 DATETIME NULL；MySQL 8 严格模式下不能与空字符串比较。
             ->whereNotNull('o.payment_time')
-            ->where('o.payment_time', '<>', '')
             ->whereBetweenTime('o.payment_time', $startDateTime, $endDateTime)
             ->fieldRaw('o.creator_id AS source_admin_id, COUNT(*) AS paid_appointment_count')
             ->group('o.creator_id');
diff --git a/server/app/adminapi/logic/stats/PerformanceDashboardLogic.php b/server/app/adminapi/logic/stats/PerformanceDashboardLogic.php
index 5b255a808..564b30426 100644
--- a/server/app/adminapi/logic/stats/PerformanceDashboardLogic.php
+++ b/server/app/adminapi/logic/stats/PerformanceDashboardLogic.php
@@ -369,8 +369,8 @@ class PerformanceDashboardLogic
             ->where('status', 2)
             ->where('amount', '>', 0)
             ->where('amount', '<', 10)
+            // payment_time 是 DATETIME NULL；MySQL 8 严格模式下不能与空字符串比较。
             ->whereNotNull('payment_time')
-            ->where('payment_time', '<>', '')
             ->whereBetweenTime(
                 'payment_time',
                 $startDate . ' 00:00:00',
@@ -501,8 +501,8 @@ class PerformanceDashboardLogic
                 ->where('o.status', 2)
                 ->where('o.amount', '>', 0)
                 ->where('o.amount', '<', 10)
+                // payment_time 是 DATETIME NULL；MySQL 8 严格模式下不能与空字符串比较。
                 ->whereNotNull('o.payment_time')
-                ->where('o.payment_time', '<>', '')
                 ->whereBetweenTime('o.payment_time', date('Y-m-d 00:00:00'), date('Y-m-d 23:59:59'));
             if ($rankingVisibleAdminIds !== null) {
                 $query->whereIn('o.creator_id', $rankingVisibleAdminIds);