Update field names

I updated the name of the fields used in examples, changing the old ones by those listed in Database tables reference

docs/querying-data.rst

@@ -99,19 +99,19 @@ The following query calculates the total value of tenders disaggregated by curre
 .. code-block:: sql
 
   SELECT
-    tender_value_currency, -- return the currency of the tender value, values in OCDS have an amount and a currency, as datasets may contain values in multiple currencies
-    tender_status,
-    sum(tender_value_amount)
+    value_currency, -- return the currency of the tender value, values in OCDS have an amount and a currency, as datasets may contain values in multiple currencies
+    status,
+    sum(value_amount)
   FROM
     tender_summary
   WHERE
     collection_id = 1259
   GROUP BY
-    tender_value_currency,
-    tender_status
+    value_currency,
+    status
   ORDER BY
-    tender_value_currency,
-    tender_status;
+    value_currency,
+    status;
 
 To learn more about the summaries and aggregates in the ``tender_summary`` table, refer to the :ref:`tender_summary` documentation.
 
@@ -141,24 +141,24 @@ The following query calculates the top 10 buyers by award value for collection `
 .. code-block:: sql
 
   SELECT
-      buyer_identifier,
+      buyer_id,
       buyer -> 'name' AS buyer_name, -- extract the buyer name from the JSON
-      award_value_currency,
-      sum(award_value_amount) AS award_amount
+      value_currency,
+      sum(value_amount) AS award_amount
   FROM
       awards_summary
   JOIN
       buyer_summary ON awards_summary.id = buyer_summary.id
   WHERE
       awards_summary.collection_id = 1259
   AND
-      awards_summary.award_value_amount > 0 -- filter out awards with no value
+      awards_summary.value_amount > 0 -- filter out awards with no value
   AND
-      awards_summary.award_status = 'active'
+      awards_summary.status = 'active'
   GROUP BY
-      buyer_identifier,
+      buyer_id,
       buyer_name,
-      award_value_currency
+      value_currency
   ORDER BY
       award_amount DESC
   LIMIT 10;