php - Inline declared MySQL 'unknown column' -


here's script i'm trying run:

$resultadospromediados = r::getall("select count(*) total,                                      sum(dialogue_score) / total dialogue_score,                                      sum(consulta_general_score) / total consulta_general_score,                                      sum(tarea_score) / total tarea_score,                                      sum(foro_calificacion_score) / total foro_calificacion_score,                                       sum(foro_respuesta_score) / total foro_respuesta_score                                     ranking                                     created = :ultima_feha",                                     array(':ultima_feha' => $fecha)); print_r($resultadospromediados);

but error:

fatal error: uncaught [42s22] - sqlstate[42s22]: column not found: 1054 unknown column 'total' in 'field list' thrown in /home/asdfasdf/public_html/adsfadsf/rb.php on line 265

how can use total rows divide sum of them average reading?

just use variable:

select @total := count(*),      sum(dialogue_score) / @total dialogue_score,      sum(consulta_general_score) / @total consulta_general_score,      sum(tarea_score) / @total tarea_score,      sum(foro_calificacion_score) / @total foro_calificacion_score,       sum(foro_respuesta_score) / @total foro_respuesta_score ranking created = :ultima_feha

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