Question

我有12个表（每个月），需要检索一个总和，让我显示查询：

UPDATE otimizacao_equipamento 
SET dic_anual = subquery.DIC,
    fic_anual = subquery.FIC
FROM (
   SELECT sum(dic) AS DIC,sum(fic) AS FIC FROM (
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes1 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes2 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes3 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL   
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes4 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes5 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes6 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes7 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes8 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes9 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL   
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes10 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes11 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento   UNION ALL    
        SELECT sum(m.dic)/count(m.codConsumidor) AS dic, sum(m.fic)/count(m.codConsumidor) AS fic FROM hierarquiaTemp AS h INNER JOIN gisTemp AS g ON g.codTransf = h.codInstalacao INNER JOIN mes12 AS m ON m.codConsumidor = g.idSap WHERE h.codEquipamento = '351CH004665' AND g.conjuntoAneel = '18' group by g.conjuntoaneel,h.codEquipamento
        ) a
   ) AS subquery
WHERE equipamento = '351CH004665' AND conjunto = '18'

版本：＆＃34; PostgreSQL 9.4.0，由Visual C ++ build 1800编译，64位＆＃34;
解释：http://explain.depesz.com/s/hIK
PC：Windows 8,8gb ram，64bits，i7 SQL CREATE：https://jsfiddle.net/DirkWeber/nnqc8/1/

每个月和gis表的平均值为7.000.000。

有时查询需要几分钟才能执行。

关系所需的所有列都是索引。

我注意到如果我运行一次查询，第二次它的速度非常快。

希望有人可以提供帮助，如果你们需要更多信息，请问。感谢

查询连接和数百万行太慢

0 个答案: