wrote script to build tables in an empty Postgres DB

dnd_bank.psql

@@ -0,0 +1,20 @@
+CREATE TABLE account (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(48) UNIQUE NOT NULL,
+    created TIMESTAMP NOT NULL
+);
+
+CREATE TABLE balance (
+    id INT NOT NULL PRIMARY KEY,
+    gold NUMERIC(16,2) NOT NULL,
+    FOREIGN KEY (id) REFERENCES account (id)
+);
+
+CREATE TABLE transaction (
+    id SERIAL PRIMARY KEY,
+    account INT NOT NULL,
+    amount NUMERIC(16,2) NOT NULL,
+    timestamp TIMESTAMP NOT NULL,
+    FOREIGN KEY (account) REFERENCES account (id)
+);
+