Joinable implementation of SQL one-to-one relation
from : Dict comparable a -> (a -> result) -> Dict comparable result
Equivalent to SQL FROM
innerJoin : Dict comparable a -> Dict comparable (a -> result) -> Dict comparable result
Equivalent to SQL INNER JOIN
leftOuterJoin : Dict comparable a -> Dict comparable (Maybe a -> result) -> Dict comparable result
Equivalent to SQL LEFT OUTER JOIN
select : a -> a
Used for clarity only and match SQL queries