Project simplebank {
     database_type: 'PostgreSQL'
     Note: '''
       # Simple Bank Database
     '''
 }

Table accounts as A {
  id bigserial [pk]
  owner varchar [not null]
  balance bigint [not null]
  currency varchar [not null]

  Indexes {
    owner
    // to make it so an owner can only have different accounts with different currency
    (owner, currency) [unique]
  }
}