mysql with inner query -

i have table stores answer survey , im trying query mysql tell me if survey answered answer field = 16 or 20

i have following mysql statement

select distinct(submissionid) submissionid answer  exists (     select *     answer     submissionid = submissionid , (answer = '16' or answer = '20')  ) 

edit here

sorry dont think said question right here table structure:

create table if not exists `answer` (   `aid` int(11) not null auto_increment,   `sid` int(11) not null,   `qtid` int(11) not null,   `answer` text not null,   `userip` text not null,   `submissionid` int(11) not null,   primary key (`aid`) ) engine=myisam  default charset=latin1 auto_increment=422 ; 

1. aid unique id every answer given
2. sid survey id (cause may have more 1 survey)
3. qtid questionsid value
4. answer answer user gave qtid of survey
5. userip self explainable
6. submissionid id gave each submission

so know in table there 5 unique submissionid's there 1 submssionid answer field = 16 , 20

i think query overly complex, try this:

select distinct submissionid answer  answer in ('16', '20');