Going somewhere.

migrations/create_tables_001.sql

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+CREATE TABLE IF NOT EXISTS users
+(
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    name       TEXT NOT NULL,
+    public_key TEXT NOT NULL,
+    foo        INTEGER
+);
+
+CREATE TABLE IF NOT EXISTS security_types
+(
+    name TEXT PRIMARY KEY
+);
+
+INSERT INTO security_types(name)
+VALUES ('currency'), ('bond');
+
+CREATE TABLE IF NOT EXISTS securities
+(
+    id            INTEGER PRIMARY KEY AUTOINCREMENT,
+    security_type TEXT NOT NULL,
+    name          TEXT NOT NULL UNIQUE,
+    symbol        TEXT NOT NULL UNIQUE,
+    FOREIGN KEY (security_type) REFERENCES security_types (name)
+);
+
+CREATE TABLE IF NOT EXISTS account
+(
+    id       INTEGER PRIMARY KEY AUTOINCREMENT,
+    security INTEGER NOT NULL,
+    owner    INTEGER NOT NULL,
+
+    FOREIGN KEY (security) REFERENCES securities (id)
+);
+
+CREATE TABLE IF NOT EXISTS account_values
+(
+    id INTEGER PRIMARY KEY AUTOINCREMENT
+);