update

app/Http/Controllers/Admin/UserController.php

@@ -289,11 +289,19 @@ class UserController extends BaseController
                 if (isset($all['course_name'])) {
                     $q->where('name', 'like', '%' . $all['course_name'] . '%');
                 }
-                if (isset($all['courses_start_date'])) {
-                    $q->where('start_date', '>=', $all['courses_start_date']);
-                }
-                if (isset($all['courses_end_date'])) {
-                    $q->where('end_date', '<=', $all['courses_end_date']);
+                // 课程日期：与统计一致，start_date 或 end_date 在区间内即计入（whereBetween 重叠逻辑）
+                if (!empty($all['courses_start_date']) && !empty($all['courses_end_date'])) {
+                    $q->where(function ($query) use ($all) {
+                        $query->whereBetween('start_date', [$all['courses_start_date'], $all['courses_end_date']])
+                            ->orWhereBetween('end_date', [$all['courses_start_date'], $all['courses_end_date']]);
+                    });
+                } else {
+                    if (!empty($all['courses_start_date'])) {
+                        $q->where('start_date', '>=', $all['courses_start_date']);
+                    }
+                    if (!empty($all['courses_end_date'])) {
+                        $q->where('end_date', '<=', $all['courses_end_date']);
+                    }
                 }
                 if (isset($all['courses_ing']) && $all['courses_ing'] == 1) {
                     $q->where(function ($query) use ($all) {