Question

ok, here we go…

I have 3 tables: posts, comments and members, i need to get title from posts, msg from comments and username from members.
all tables has an identical ID to associate(?)

for example: i want to get these data from certain ID…

sorry for my bad english, isn’t my language, and my very basic skill on MySQL (started today).

Edit:
this is my schema:

posts:    |ID|title|
          ----------------
          |1 |post title|        (example data)

comments: |USERID|UID|msg|  (UID is same as posts.ID)
          -----------------
          |5     |1  |message|   (example data)    

members:  |USERID|username|
          -----------------
          |5     |myusername|    (example data)

when i make a query to ID 80 (eg.) will return the title, the messages associated to that post (UID) and the username associated to that comment.

for eg. if the post 80 have 5 comments shows, title of post and username of comment.

i think this is more clear. (no?)

Answer 1

Maybe something like this:

SELECT P.Title, C.Message, M.Username
FROM   Posts P
INNER JOIN Comments C ON P.PostID = C.PostID
INNER JOIN Memmbers M ON C.MemberID = M.MemberID
WHERE P.PostID = 123

Here it is with your schema (I think mine is better that’s why I left it) 🙂

SELECT P.title, C.msg, M.username
FROM   posts P
INNER JOIN comments C ON P.ID = C.UID
INNER JOIN memmbers M ON C.USERID = M.USERID
WHERE P.ID = 80

The post title will be repeated in this case, but I believe this is what you are asking for.