para obtener los premios de un salon por mes con porcentajes

SELECT n_aw.id_award, n_aw.title_award, CASE WHEN res_aw.count_aw is not null then res_aw.count_aw ELSE 0 END AS count_awards FROM notas.award n_aw LEFT JOIN (SELECT award_x_mes.id_award, award_x_mes.title_award, COUNT(1) AS count_aw FROM (SELECT p.*, na.title_award, na.award_points FROM (SELECT (t.unw->>'idx') AS idx_award, (t.unw->>'id_award')::integer AS id_award, (t.unw->>'desc_award') AS desc_award, (t.unw->>'fecha_award') AS fecha_award FROM (SELECT JSONB_ARRAY_ELEMENTS(json_awards) AS unw FROM notas.notas_estudiante WHERE _id_main = 7342) t) p, notas.award na WHERE to_char(p.fecha_award::TIMESTAMP WITH TIME ZONE, 'MM-YYYY') = to_char('08-01-2019'::TIMESTAMP WITH TIME ZONE, 'MM-YYYY') AND p.id_award = na.id_award) award_x_mes GROUP BY award_x_mes.id_award,award_x_mes.title_award) res_aw ON (n_aw.id_award = res_aw.id_award)

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