diff --git a/TROUBLESHOOTING.md b/TROUBLESHOOTING.md
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+# Troubleshooting Guide
+
+## Error: "Unknown column 't.amount' in 'SELECT'"
+
+### Kemungkinan Penyebab:
+1. **OPcache belum di-clear** - PHP masih menggunakan file lama
+2. **Struktur database berbeda** - Kolom `amount` mungkin tidak ada atau nama berbeda
+3. **File belum ter-update** - Meskipun sudah `git pull`, file mungkin belum benar-benar ter-update
+
+---
+
+## Solusi di Production
+
+### Step 1: Clear OPcache
+```bash
+# Di production server
+cd /www/wwwroot/api.btekno.cloud/api
+
+# Clear OPcache via PHP CLI
+php -r "opcache_reset();"
+
+# Atau restart PHP-FPM
+systemctl restart php-fpm
+# atau
+/www/server/php/83/bin/php-fpm restart
+```
+
+### Step 2: Verify File Sudah Ter-update
+```bash
+# Cek apakah file sudah benar-benar ter-update
+grep -n "COALESCE(t.amount, 0)" src/Modules/Retribusi/Summary/DailySummaryService.php
+
+# Harus muncul di line 46 dan 61
+# Line 46: COALESCE(t.amount, 0) as tariff_amount
+# Line 61: COALESCE(t.amount, 0)
+```
+
+### Step 3: Verify Struktur Database
+```bash
+# Login ke MySQL
+mysql -u sql_retribusi -p sql_retribusi
+
+# Cek struktur tabel tariffs
+DESCRIBE tariffs;
+
+# Harus ada kolom:
+# - location_code
+# - gate_code  
+# - category
+# - amount  <-- INI HARUS ADA!
+```
+
+### Step 4: Test Query Manual
+```bash
+# Di MySQL client
+mysql -u sql_retribusi -p sql_retribusi < bin/verify_query.sql
+
+# Atau jalankan query ini manual:
+```
+
+```sql
+SELECT 
+    DATE(e.event_time) as summary_date,
+    e.location_code,
+    e.gate_code,
+    e.category,
+    COUNT(*) as total_count,
+    COALESCE(t.amount, 0) as tariff_amount
+FROM entry_events e
+INNER JOIN locations l ON e.location_code = l.code AND l.is_active = 1
+INNER JOIN gates g ON e.location_code = g.location_code 
+    AND e.gate_code = g.gate_code 
+    AND g.is_active = 1
+LEFT JOIN tariffs t ON e.location_code = t.location_code
+    AND e.gate_code = t.gate_code
+    AND e.category = t.category
+WHERE DATE(e.event_time) = CURDATE()
+GROUP BY 
+    DATE(e.event_time),
+    e.location_code,
+    e.gate_code,
+    e.category,
+    COALESCE(t.amount, 0)
+LIMIT 5;
+```
+
+### Step 5: Test Script Lagi
+```bash
+cd /www/wwwroot/api.btekno.cloud/api
+php bin/daily_summary.php 2025-12-16
+```
+
+---
+
+## Cek Database Lokal
+
+### Step 1: Setup .env (jika belum)
+```bash
+# Copy .env.example ke .env
+cp .env.example .env
+
+# Edit .env, isi dengan database lokal:
+DB_HOST=localhost
+DB_NAME=sql_retribusi
+DB_USER=sql_retribusi
+DB_PASS=your_password_here
+```
+
+### Step 2: Jalankan Script Check Database
+```bash
+php bin/check_database.php
+```
+
+### Step 3: Verify Query di Lokal
+```bash
+# Via MySQL client
+mysql -u sql_retribusi -p sql_retribusi < bin/verify_query.sql
+```
+
+### Step 4: Test Daily Summary di Lokal
+```bash
+php bin/daily_summary.php 2025-12-16
+```
+
+---
+
+## Apply Migrations
+
+### Migration yang Tersedia:
+1. `001_create_audit_logs.sql` - Tabel audit_logs
+2. `002_create_hourly_summary.sql` - Tabel hourly_summary
+3. `003_create_realtime_events.sql` - Tabel realtime_events
+
+### Cara Apply (Lokal):
+```bash
+# Via MySQL command line
+mysql -u sql_retribusi -p sql_retribusi < migrations/001_create_audit_logs.sql
+mysql -u sql_retribusi -p sql_retribusi < migrations/002_create_hourly_summary.sql
+mysql -u sql_retribusi -p sql_retribusi < migrations/003_create_realtime_events.sql
+```
+
+### Cara Apply (Production):
+```bash
+# Di production server
+cd /www/wwwroot/api.btekno.cloud/api
+
+# Backup dulu!
+mysqldump -u sql_retribusi -p sql_retribusi > backup_$(date +%Y%m%d_%H%M%S).sql
+
+# Apply migration
+mysql -u sql_retribusi -p sql_retribusi < migrations/001_create_audit_logs.sql
+mysql -u sql_retribusi -p sql_retribusi < migrations/002_create_hourly_summary.sql
+mysql -u sql_retribusi -p sql_retribusi < migrations/003_create_realtime_events.sql
+```
+
+---
+
+## Jika Masih Error
+
+### Cek Log Error Detail:
+```bash
+# Di production
+cd /www/wwwroot/api.btekno.cloud/api
+php bin/daily_summary.php 2025-12-16 2>&1 | tee error.log
+```
+
+### Cek Apakah Tabel Tariffs Ada:
+```sql
+-- Di MySQL
+SHOW TABLES LIKE 'tariffs';
+SELECT COUNT(*) FROM tariffs;
+```
+
+### Cek Apakah Ada Data di Entry Events:
+```sql
+-- Di MySQL
+SELECT COUNT(*) FROM entry_events WHERE DATE(event_time) = CURDATE();
+```
+
+---
+
+## Quick Fix (Jika OPcache Issue)
+
+```bash
+# Di production, restart PHP-FPM
+systemctl restart php-fpm
+
+# Atau via aaPanel
+# PHP → PHP-FPM → Restart
+
+# Lalu test lagi
+cd /www/wwwroot/api.btekno.cloud/api
+php bin/daily_summary.php 2025-12-16
+```
+
diff --git a/bin/check_database.php b/bin/check_database.php
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+++ b/bin/check_database.php
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+<?php
+
+declare(strict_types=1);
+
+/**
+ * Script to check database structure
+ * Usage: php bin/check_database.php
+ */
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use App\Config\AppConfig;
+use App\Support\Database;
+
+// Load environment variables
+AppConfig::loadEnv(__DIR__ . '/..');
+
+// Get database connection
+$dbHost = AppConfig::get('DB_HOST', 'localhost');
+$dbName = AppConfig::get('DB_NAME', '');
+$dbUser = AppConfig::get('DB_USER', '');
+$dbPass = AppConfig::get('DB_PASS', '');
+
+if (empty($dbName) || empty($dbUser)) {
+    echo "Error: Database credentials not configured in .env\n";
+    exit(1);
+}
+
+try {
+    $db = Database::getConnection($dbHost, $dbName, $dbUser, $dbPass);
+    
+    echo "=== Database Structure Check ===\n\n";
+    
+    // Check tariffs table structure
+    echo "1. Checking tariffs table structure:\n";
+    $stmt = $db->query("DESCRIBE tariffs");
+    $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
+    
+    if (empty($columns)) {
+        echo "   ❌ Table 'tariffs' does not exist!\n";
+    } else {
+        echo "   ✅ Table 'tariffs' exists with columns:\n";
+        foreach ($columns as $col) {
+            echo "      - {$col['Field']} ({$col['Type']})\n";
+        }
+    }
+    
+    echo "\n2. Checking locations table structure:\n";
+    $stmt = $db->query("DESCRIBE locations");
+    $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
+    
+    if (empty($columns)) {
+        echo "   ❌ Table 'locations' does not exist!\n";
+    } else {
+        echo "   ✅ Table 'locations' exists with columns:\n";
+        foreach ($columns as $col) {
+            echo "      - {$col['Field']} ({$col['Type']})\n";
+        }
+    }
+    
+    echo "\n3. Checking gates table structure:\n";
+    $stmt = $db->query("DESCRIBE gates");
+    $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
+    
+    if (empty($columns)) {
+        echo "   ❌ Table 'gates' does not exist!\n";
+    } else {
+        echo "   ✅ Table 'gates' exists with columns:\n";
+        foreach ($columns as $col) {
+            echo "      - {$col['Field']} ({$col['Type']})\n";
+        }
+    }
+    
+    echo "\n4. Checking entry_events table structure:\n";
+    $stmt = $db->query("DESCRIBE entry_events");
+    $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
+    
+    if (empty($columns)) {
+        echo "   ❌ Table 'entry_events' does not exist!\n";
+    } else {
+        echo "   ✅ Table 'entry_events' exists with columns:\n";
+        foreach ($columns as $col) {
+            echo "      - {$col['Field']} ({$col['Type']})\n";
+        }
+    }
+    
+    echo "\n5. Testing query (similar to DailySummaryService):\n";
+    $testSql = "
+        SELECT 
+            DATE(e.event_time) as summary_date,
+            e.location_code,
+            e.gate_code,
+            e.category,
+            COUNT(*) as total_count,
+            COALESCE(t.amount, 0) as tariff_amount
+        FROM entry_events e
+        INNER JOIN locations l ON e.location_code = l.code AND l.is_active = 1
+        INNER JOIN gates g ON e.location_code = g.location_code 
+            AND e.gate_code = g.gate_code 
+            AND g.is_active = 1
+        LEFT JOIN tariffs t ON e.location_code = t.location_code
+            AND e.gate_code = t.gate_code
+            AND e.category = t.category
+        WHERE DATE(e.event_time) = CURDATE()
+        GROUP BY 
+            DATE(e.event_time),
+            e.location_code,
+            e.gate_code,
+            e.category,
+            COALESCE(t.amount, 0)
+        LIMIT 1
+    ";
+    
+    try {
+        $stmt = $db->query($testSql);
+        $result = $stmt->fetch(PDO::FETCH_ASSOC);
+        echo "   ✅ Query executed successfully!\n";
+        if ($result) {
+            echo "   Sample result: " . json_encode($result, JSON_PRETTY_PRINT) . "\n";
+        } else {
+            echo "   No data found for today.\n";
+        }
+    } catch (PDOException $e) {
+        echo "   ❌ Query failed: " . $e->getMessage() . "\n";
+    }
+    
+    echo "\n=== Check Complete ===\n";
+    
+} catch (PDOException $e) {
+    echo "Database Error: " . $e->getMessage() . "\n";
+    exit(1);
+}
+