project - Selecting values based on other values SQL? -

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i wasn't sure title question, apologize if title misleading.

i have 2 columns in table movieid , format (i have more, these ones focusing on.

there 2 types of values in 'format' column: 'dvd' , 'blu-ray'. want select movies have dvd format. note there multiple movies have blu-ray , dvd format, not want display these values. see fiddle below sample of data. thank you!!!

http://sqlfiddle.com/#!2

movieid | format ----------------- 1000    dvd 1000    dvd 1000    blu-ray 1001    dvd 1001    dvd 1002    dvd 1003    dvd 1003    blu-ray 1004    dvd

i want output

movieid ------------ 1001     1002      1004

one straightforward way accomplish follows:

select distinct (movieid) movies m format='dvd' , not exists (     select * movies mm mm.movieid=m.movieid , mm.format='blu-ray' )

this pretty translation of english description of problem sql syntax.


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