小编Mic*_*osa的帖子

架构

CREATE TABLE person
(
     [first_name] VARCHAR(10), 
     [surname] VARCHAR(10), 
     [dob] DATE, 
     [person_id] INT
);

INSERT INTO person ([first_name], [surname], [dob] ,[person_id]) 
VALUES
    ('Alice', 'AA', '1/1/1960', 1),
    ('Bob'  , 'AA', '1/1/1980', 2),
    ('Carol', 'AA', '1/1/2018', 3),
    ('Dave' , 'BB', '1/1/1960', 4),
    ('Elsa', ' BB', '1/1/1980', 5),
    ('Fred' , 'BB', '1/1/1990', 6),
    ('Gina' , 'BB', '1/1/2018', 7);

CREATE TABLE person_membership
(
    [person_id] INT, 
    [personstatus] VARCHAR(1), 
    [membership_id] INT, 
    [relationship] INT
);

INSERT INTO person_membership ([person_id], [personstatus], [membership_id], [relationship])
VALUES
    (1, 'A', 10, 1), …