Update README.md

README.md

@@ -1,3 +1,52 @@
----
-license: mit
----
+# App Store Data (November 2025)
+
+This repository contains sample database with 1,000 apps. The full
+database has 1,165,456 applications.
+
+## Selects
+
+Open the database using any SQLite3 GUI app (e.g. SQLiteStudio or SQLiteBrowser)
+and make some queries. Some examples are below.
+
+### Most Expensive Non-Free Apps
+
+SELECT
+    s.canonical_url,
+    s.app_name,
+    s.currency,
+    s.total_ratings,
+    s.rating_average,
+    a.category,
+    a.subcategory,
+    MAX(s.price / 100.0 / cr.rate) AS usd_price
+FROM stores s
+JOIN apps a
+    ON a.int_id = s.int_app_id
+JOIN currency_rates cr
+    ON cr.currency = s.currency
+GROUP BY s.canonical_url
+ORDER BY usd_price DESC, s.int_app_id ASC
+LIMIT 1000;
+
+### Most Expensive IAP Products
+
+SELECT
+    s.canonical_url,
+    s.app_name,
+    s.currency,
+    s.total_ratings,
+    s.rating_average,
+    a.category,
+    a.subcategory,
+    iap.product,
+    iap.price / 100.0 / cr.rate AS usd_price
+FROM stores s
+JOIN apps a
+    ON a.int_id = s.int_app_id
+JOIN in_app_products iap
+    ON iap.int_store_id = s.int_id
+JOIN currency_rates cr
+    ON cr.currency = iap.currency
+GROUP BY s.canonical_url
+ORDER BY usd_price DESC, s.int_app_id ASC
+LIMIT 1000;