Added column zmm operating temperature in class characteristics

database/migrations/2026_06_01_172108_add_zmm_operating_temperature_to_class_characteristics.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $sql1 = <<<'SQL'
+        ALTER TABLE class_characteristics
+        ADD COLUMN zmm_operating_temperature TEXT DEFAULT NULL
+        SQL;
+
+        DB::statement($sql1);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('class_characteristics', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};