Question

t_message
msg_id
message
username
date_post
url

t_comment
com_id
comment
msg_id
username
date_comment
url

How can I show comment based on msg_id ?
Example :

john posted message : welcome to my world.
Then jane commented his message : welcome too.
and greg commented too : welcome boss…

other jane posted message : i’m happy today.
then Greg commented her message : wow…

Should be each will be different show right ?

Any suggestions ?

Answer 1

To retrieve comment based on msg_id

SELECT c.comment,c.username from t_comment c 
left join t_message m on c.msg_id=m.msg_id 
where c.msg_id={your msg id} 
order by c.date_comment

To retrive comments and message based on a msg_id

select * from
(select m.message,m.username,m.date_post as date_p,m.msg_id from t_message m
union
SELECT c.comment,c.username,c.date_comment as date_p,c.msg_id from t_comment c 
left join t_message m on c.msg_id=m.msg_id )t
where t.msg_id={your msg id} 
order by t.date_p