Select rows from one table, join most recent row from other table with one-to-many relationship

Question

What I would like to do is select a specific set of rows from one table (table A) and join with another table (table B), such that only one record will appear from table A,

Answer 1

I think this will help you:

SELECT A.id, A.col_1, A.col_2, A.datetime_col, A.col_3
FROM
    (SELECT B.id, B.col_1, B.col_2, C.datetime_col, C.col_3
    FROM tableA B LEFT OUTER JOIN tableB C ON B.id = C.id
    ORDER BY C.datetime_col desc) as A
GROUP BY A.id