Forum query with variables

pmvalente

posted 8 years ago

Database Eloquent

Last updated 1 year ago.

pmvalente

replied 8 years ago

from http://stackoverflow.com/users/3088349/maytham

DB::statement(DB::raw('SET @prev=0,@rownum=0'));

$results =
    DB::select(
        DB::raw("
          SELECT utilizador_id, nome
          FROM (
            SELECT *,
                 IF( @prev <> utilizador_id,
                     @rownum := 1,
                     @rownum := @rownum+1
                 ) AS rank,
                 @prev := utilizador_id,
                 @rownum
            FROM (
              SELECT * FROM `anuncios`
              ORDER BY utilizador_id, rand()
            ) AS random_ads
          ) AS ads_ranked
          WHERE rank <= 2;
        ")
    );

Last updated 8 years ago.