mysql查询将行输出到列

Question

我的以下查询 100% 有效。

SELECT
transporttype,
concat(MONTHNAME(STR_TO_DATE(month, '%m')), ' ', year) AS `month`,
round(sum(cost),0) AS cost
FROM v2ReportingTable
WHERE (transporttype not in ('Extrusions-LongDistance','Extrusions-Shuttle') and urgent='no')
GROUP BY (concat(MONTHNAME(STR_TO_DATE(month, '%m')),' ',year)),transporttype
ORDER BY (concat(MONTHNAME(STR_TO_DATE(month, '%m')),' ',year)), transporttype

这会在 1 列中输出结果，如下所示:

我怎样才能操纵查询，使输出在列中，这样我就可以绘制它。所需的输出如下:

一如既往的帮助，

已更新以匹配 Oscar Pérez 的可能答案

Answer 1

您可以使用 LEFT JOIN 运算符。例如:

SELECT s0.month, 
       s1.cost as Inbound, 
       s2.cost as LocalPMB,
       s3.cost as Shuttle,    
       s4.cost as LongDistance
  FROM (
         SELECT 1 as month
          UNION
         SELECT 2 as month
          UNION
         SELECT 3 as month
          UNION
         SELECT 4 as month
          UNION
         SELECT 5 as month
          UNION
         SELECT 6 as month
          UNION
         SELECT 7 as month
          UNION
         SELECT 8 as month
          UNION
         SELECT 9 as month
          UNION
         SELECT 10 as month
          UNION
         SELECT 11 as month
          UNION
         SELECT 12 as month
       ) as s0
LEFT JOIN
       (
         SELECT month,
                round(sum(cost),0) AS cost
           FROM v2ReportingTable
          WHERE urgent='no'
            AND transporttype='Inbound'
       GROUP BY month
       ) as s1 on s0.month=s1.month
LEFT JOIN
       (
         SELECT month,
                round(sum(cost),0) AS cost
           FROM v2ReportingTable
          WHERE urgent='no'
            AND transporttype='LocalPMB'
       GROUP BY month
       ) as s2 on s0.month=s2.month
LEFT JOIN
       (
         SELECT month,
                round(sum(cost),0) AS cost
           FROM v2ReportingTable
          WHERE urgent='no'
            AND transporttype='Shuttle'
       GROUP BY month
       ) as s3 on s0.month=s3.month
LEFT JOIN
       (
         SELECT month,
                round(sum(cost),0) AS cost
           FROM v2ReportingTable
          WHERE urgent='no'
            AND transporttype='Long Distance'
       GROUP BY month
       ) as s4 on s0.month=s4.month
ORDER BY month