两个查询vs选择全部

I am using Mysql and php.

This is my table structure:=

+----+---------------+--------+--------+--------+--------+--------+--------+
| id | no_of_replies | reply1 | reply2 | reply3 | reply4 | reply5 | reply6 |
+----+---------------+--------+--------+--------+--------+--------+--------+
| -- | --            |        | --     | --     | --     | --     | --     |
+----+---------------+--------+--------+--------+--------+--------+--------+

There are max six replies a user can give for a question.Most of the time user is giving 4-5 replies.i store the number of replies(no_of_replies) and all the replies(reply1,reply2,...). Mostly the reply5 and reply6 are NULL.

so when displaying data I have 2 options.

option1:- do single query and get all responses-

SELECT * FROM `responses` WHERE `id`='xyz'

option2:- do 2 queries and get required responses.

SELECT `no_of_repies` FROM `responses` WHERE `id`='xyz'

if result is 3

SELECT reply1,reply2,reply3 FROM responses WHERE id='XYZ'

NOTE:= I am asking this because this table is going to be used very often and needs to quickly give responses.

You should read about database normalization.In your case i would do it like this :

tabel
---------------------------------
id    reply     date   questinID

to get the amount of replies for 1 person for 1 question

SELECT COUNT(*) FROM tabel WHERE id=userid AND questionID=questionid;

to get the replies for 1 question for 1 user:

SELECT * FROM tabel WHERE id=userid AND questionID=questinid ORDER BY date;