How to make comment reply query in MYSQL?

Question

I am having comment reply (only till one level) functionality. All comments can have as many as replies but no replies can have their further replies.

So my database

Answer 1

If you / somebody is looking for simple solution, then it might be helpfull.

Structure Change - I suppose you have changed it by adding Blog ID, If there is no blog ID, how do you say which comments are specific to a Blog?

First do this, it won't harm anything to your database,

update `tblcomments` set ParentId=Id where ParentId=0;

then to get the blog comments and comment replies in order (comment - reply 1, reply 2... under the comment)

use the bleow query

SELECT * 
FROM  tblcomments 
ORDER BY  ParentId ASC;

Cheers, -PM.