# n8n Postgres Node - Korrigierte Version

## SQL Query (ohne Kommentare, mit $1 Parameter)
```sql
SELECT 
    so.external_ref AS "Bestellnummer",
    TO_CHAR(so.order_date, 'YYYY-MM-DD"T"HH24:MI:SS') AS "Bestelldatum",
    TO_CHAR(so.shipping_date, 'YYYY-MM-DD') AS "Versanddatum",
    COALESCE(ad.first_name, '') AS "Vorname",
    COALESCE(ad.last_name, '') AS "Nachname",
    COALESCE(ad.street, '') AS "Strasse",
    COALESCE(ad.house_number, '') AS "Hausnummer",
    COALESCE(ad.zip, '') AS "PLZ",
    COALESCE(ad.city, '') AS "Stadt",
    COALESCE(ad.country_name, '') AS "Land",
    COALESCE(pm.code, '') AS "Zahlungsart",
    COALESCE(so.amount_net, 0) AS "Gesamtbetrag_netto",
    COALESCE(so.amount_shipping, 0) AS "Versandkosten",
    COALESCE(so.total_amount, 0) AS "Gesamtbetrag_brutto",
    COALESCE(so.amount_discount, 0) AS "Rabatt",
    COALESCE(SUM(CASE WHEN p.id = 8 THEN a.qty ELSE 0 END), 0) AS "#_ChagaFlaschen",
    COALESCE(SUM(CASE WHEN p.id = 5 THEN a.qty ELSE 0 END), 0) AS "#_ReishiFlaschen",
    COALESCE(SUM(CASE WHEN p.id = 9 THEN a.qty ELSE 0 END), 0) AS "#_ShiitakeFlaschen",
    COALESCE(SUM(CASE WHEN p.id = 6 THEN a.qty ELSE 0 END), 0) AS "#_LionsManeFlaschen"
FROM sales_order so
LEFT JOIN address ad ON so.party_id = ad.party_id AND ad.type = 'shipping'
LEFT JOIN payment_method pm ON so.payment_method_id = pm.id
LEFT JOIN sales_order_line sol ON so.id = sol.sales_order_id
LEFT JOIN sales_order_line_lot_allocation a ON sol.id = a.sales_order_line_id
LEFT JOIN product p ON a.product_id = p.id AND p.status = 'active'
WHERE so.external_ref = $1
GROUP BY so.id, ad.id, pm.id
```

## Alternative mit einfachen Feldnamen (keine Anführungszeichen):
```sql
SELECT 
    so.external_ref AS Bestellnummer,
    TO_CHAR(so.order_date, 'YYYY-MM-DD"T"HH24:MI:SS') AS Bestelldatum,
    TO_CHAR(so.shipping_date, 'YYYY-MM-DD') AS Versanddatum,
    COALESCE(ad.first_name, '') AS Vorname,
    COALESCE(ad.last_name, '') AS Nachname,
    COALESCE(ad.street, '') AS Strasse,
    COALESCE(ad.house_number, '') AS Hausnummer,
    COALESCE(ad.zip, '') AS PLZ,
    COALESCE(ad.city, '') AS Stadt,
    COALESCE(ad.country_name, '') AS Land,
    COALESCE(pm.code, '') AS Zahlungsart,
    COALESCE(so.amount_net, 0) AS Gesamtbetrag_netto,
    COALESCE(so.amount_shipping, 0) AS Versandkosten,
    COALESCE(so.total_amount, 0) AS Gesamtbetrag_brutto,
    COALESCE(so.amount_discount, 0) AS Rabatt,
    COALESCE(SUM(CASE WHEN p.id = 8 THEN a.qty ELSE 0 END), 0) AS _ChagaFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 5 THEN a.qty ELSE 0 END), 0) AS _ReishiFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 9 THEN a.qty ELSE 0 END), 0) AS _ShiitakeFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 6 THEN a.qty ELSE 0 END), 0) AS _LionsManeFlaschen
FROM sales_order so
LEFT JOIN address ad ON so.party_id = ad.party_id AND ad.type = 'shipping'
LEFT JOIN payment_method pm ON so.payment_method_id = pm.id
LEFT JOIN sales_order_line sol ON so.id = sol.sales_order_id
LEFT JOIN sales_order_line_lot_allocation a ON sol.id = a.sales_order_line_id
LEFT JOIN product p ON a.product_id = p.id AND p.status = 'active'
WHERE so.external_ref = $1
GROUP BY so.id, ad.id, pm.id
```

## Query Values in n8n
```json
{
  "values": {
    "value": "={{ $json.Bestellnummer }}",
    "string": "={{ $json.Bestellnummer }}"
  }
}
```

## Testing Query direkt in DB
```bash
psql "postgresql://codex_db_user:Ze90re0KAry8gyJ6eAx0Gf4IelEGI@192.168.1.199:55432/naurua_erp" -c "
SELECT 
    so.external_ref AS Bestellnummer,
    TO_CHAR(so.order_date, 'YYYY-MM-DD\"T\"HH24:MI:SS') AS Bestelldatum,
    TO_CHAR(so.shipping_date, 'YYYY-MM-DD') AS Versanddatum,
    COALESCE(ad.first_name, '') AS Vorname,
    COALESCE(ad.last_name, '') AS Nachname,
    COALESCE(ad.street, '') AS Strasse,
    COALESCE(ad.house_number, '') AS Hausnummer,
    COALESCE(ad.zip, '') AS PLZ,
    COALESCE(ad.city, '') AS Stadt,
    COALESCE(ad.country_name, '') AS Land,
    COALESCE(pm.code, '') AS Zahlungsart,
    COALESCE(so.amount_net, 0) AS Gesamtbetrag_netto,
    COALESCE(so.amount_shipping, 0) AS Versandkosten,
    COALESCE(so.total_amount, 0) AS Gesamtbetrag_brutto,
    COALESCE(so.amount_discount, 0) AS Rabatt,
    COALESCE(SUM(CASE WHEN p.id = 8 THEN a.qty ELSE 0 END), 0) AS _ChagaFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 5 THEN a.qty ELSE 0 END), 0) AS _ReishiFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 9 THEN a.qty ELSE 0 END), 0) AS _ShiitakeFlaschen,
    COALESCE(SUM(CASE WHEN p.id = 6 THEN a.qty ELSE 0 END), 0) AS _LionsManeFlaschen
FROM sales_order so
LEFT JOIN address ad ON so.party_id = ad.party_id AND ad.type = 'shipping'
LEFT JOIN payment_method pm ON so.payment_method_id = pm.id
LEFT JOIN sales_order_line sol ON so.id = sol.sales_order_id
LEFT JOIN sales_order_line_lot_allocation a ON sol.id = a.sales_order_line_id
LEFT JOIN product p ON a.product_id = p.id AND p.status = 'active'
WHERE so.external_ref = '10477'
GROUP BY so.id, ad.id, pm.id;"
```