Exercise 2- UTXOS

project1/b.sql

@@ -0,0 +1,30 @@
+-- Clean tables
+DROP TABLE IF EXISTS utxos;
+DROP TABLE IF EXISTS number_of_utxos;
+DROP TABLE IF EXISTS id_of_max_utxo;
+CREATE TABLE utxos (output_id int, value bigint); 
+CREATE TABLE number_of_utxos (utxo_count int); 
+CREATE TABLE id_of_max_utxo (max_utxo int);
+
+-- Get all utxos
+
+INSERT INTO utxos
+SELECT output_id, value 
+FROM outputs
+WHERE NOT EXISTS (
+    SELECT * FROM inputs
+    WHERE inputs.output_id = outputs.output_id
+    );
+
+-- Get number of utxos
+
+INSERT INTO number_of_utxos
+SELECT COUNT(output_id) FROM utxos;
+
+-- Get highest valued utxo
+
+INSERT INTO id_of_max_utxo
+SELECT output_id FROM utxos
+ORDER BY value DESC
+LIMIT 1;
+