CrypthonicsException d509f430bf Exercise 2- UTXOS
2021-11-20 20:46:17 +03:00

31 lines
638 B
SQL

-- 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;