车位辨识率导出优化4

app/Exports/LicensePlateRecognitionExport.php

@@ -16,7 +16,7 @@ class LicensePlateRecognitionExport implements FromArray, WithHeadings
         $index = 1;
         $query = LicensePlateRecognition::query();
         $query->groupBy(['time_slot'])->latest('time_slot')
-            ->forPage(1, 1000)->get()->each(
+            ->forPage(1, 1000)->select('time_slot')->get()->each(
             function ($item) use (&$data, &$index) {
                 $countData = (new LicensePlateRecognitionService(
                     new OperationLogService()