mysql显示每个月的结果，基于连接的结果为0

时间：2018-09-27 08:07:02

标签： mysql

我原来的查询是这样的，它获取总计记录，然后按特定会计年度的相应年份和月份进行分组。

`SELECT s.field_source_target_id AS field_source_target_id, tfd.name AS name, tfdc.name AS tfdc_name,
       tfdr.name AS tfdr_name, max(nfcd.field_creation_date_value) AS Monat,
       COUNT(DISTINCT nfd.nid) AS IntpM, SUM(case WHEN doing.field_doings_target_id in(26) then 1 else 0 end) AS IGVB, SUM(case WHEN doing.field_doings_target_id in(27) then 1 else 0 end) AS IGDG, SUM(case WHEN doing.field_doings_target_id in(30) then 1 else 0 end) AS PTVB,SUM(case WHEN doing.field_doings_target_id in(31) then 1 else 0 end) AS PTDG,SUM(case WHEN doing.field_doings_target_id in(28) then 1 else 0 end) AS VGVB, SUM(case WHEN doing.field_doings_target_id in(29) then 1 else 0 end) AS VGDG,
       COUNT(DISTINCT case WHEN st.field_status_target_id in(33,34,35) then nfd.nid else null end) AS Onboard
FROM
  node_field_data nfd
  INNER JOIN node__field_region r ON r.entity_id = nfd.nid
  INNER JOIN node__field_source s ON s.entity_id = nfd.nid
  left JOIN node__field_creation_date nfcd ON nfcd.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfd ON tfd.tid = s.field_source_target_id
  INNER JOIN node__field_status st ON st.entity_id = nfd.nid
  LEFT OUTER JOIN node__field_onboard_vpkn vpkn ON vpkn.entity_id = nfd.nid
  INNER JOIN node__field_channel nfc ON nfc.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfdr ON tfdr.tid = r.field_region_target_id
  INNER JOIN taxonomy_term_field_data tfdc ON tfdc.tid = nfc.field_channel_target_id
  LEFT OUTER JOIN node__field_doings doing ON doing.entity_id = nfd.nid
WHERE
      (type = 'candidate') AND (status = 1)
GROUP BY tfd.name, tfdc.name, tfdr.name, r.field_region_target_id, s.field_source_target_id,
  YEAR(nfcd.field_creation_date_value), MONTH(nfcd.field_creation_date_value)

ORDER BY s.field_source_target_id ASC,tfdr_name ASC`

结果看起来像

83,SEA,KMU,R1,2018-08-07,1
83,SEA,KMU,R2,2018-05-23,2
83,SEA,KMU,R2,2018-06-20,1
83,SEA,KMU,R2,2018-07-17,2

现在，我想查询每个通道和每个区域每个月每个节点在node__field_creation_date表中与其他表结合的记录。到目前为止我尝试过的

    SELECT  allmonths.m,nfcd.field_creation_date_value,MONTH(nfcd.field_creation_date_value) as month
  ,s.field_source_target_id AS field_source_target_id, tfd.name AS name, tfdc.name AS tfdc_name,
  tfdr.name AS tfdr_name, max(nfcd.field_creation_date_value) AS Monat,
  COUNT(DISTINCT nfd.nid) AS IntpM, SUM(case WHEN doing.field_doings_target_id in(26) then 1 else 0 end) AS IGVB, SUM(case WHEN doing.field_doings_target_id in(27) then 1 else 0 end) AS IGDG, SUM(case WHEN doing.field_doings_target_id in(30) then 1 else 0 end) AS PTVB,SUM(case WHEN doing.field_doings_target_id in(31) then 1 else 0 end) AS PTDG,SUM(case WHEN doing.field_doings_target_id in(28) then 1 else 0 end) AS VGVB, SUM(case WHEN doing.field_doings_target_id in(29) then 1 else 0 end) AS VGDG,
  COUNT(DISTINCT case WHEN st.field_status_target_id in(33,34,35) then nfd.nid else null end) AS Onboard
FROM (
    SELECT 01 as m UNION SELECT 2 as m UNION SELECT 03 as m UNION SELECT 04 as m UNION SELECT 5 as m UNION SELECT 6 as m
    UNION SELECT 7 as m UNION SELECT 8 as m UNION SELECT 09 as m UNION SELECT 10 as m UNION SELECT 11 as m UNION SELECT 12 as m
  ) as allmonths
  left JOIN node__field_creation_date nfcd ON MONTH(nfcd.field_creation_date_value) = allmonths.m
  LEFT JOIN node_field_data nfd ON nfd.nid = nfcd.entity_id
  INNER JOIN node__field_region r ON r.entity_id = nfd.nid
  INNER JOIN node__field_source s ON s.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfd ON tfd.tid = s.field_source_target_id
  INNER JOIN node__field_status st ON st.entity_id = nfd.nid
  LEFT OUTER JOIN node__field_onboard_vpkn vpkn ON vpkn.entity_id = nfd.nid
  INNER JOIN node__field_channel nfc ON nfc.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfdr ON tfdr.tid = r.field_region_target_id
  INNER JOIN taxonomy_term_field_data tfdc ON tfdc.tid = nfc.field_channel_target_id
  LEFT OUTER JOIN node__field_doings doing ON doing.entity_id = nfd.nid
WHERE
  (nfcd.field_creation_date_value BETWEEN '2018-04-01' AND '2019-03-31') AND
       (type = 'candidate') AND (status = 1)
GROUP BY tfd.name, tfdc.name, tfdr.name, r.field_region_target_id, s.field_source_target_id,
  allmonths.m
#   ,YEAR(nfcd.field_creation_date_value), MONTH(nfcd.field_creation_date_value)
ORDER BY s.field_source_target_id ASC
  ,tfdc_name,tfdr_name,Monat ASC;

我想要类似

83,SEA,KMU,R1,2018-08-07,1
83,SEA,KMU,R2,2018-05-23,2
83,SEA,KMU,R2,2018-04-23,0 // missing month with 0 records
83,SEA,KMU,R2,2018-06-20,1
83,SEA,KMU,R2,2018-07-17,2

我得到的结果与上面的查询相同。有人想帮助我吗？

1 个答案:

答案 0 :(得分：0)

将(nfcd.field_creation_date_value BETWEEN '2018-04-01' AND '2019-03-31')从您的WHERE子句转移到左联接条件（ON子句）。

由于此条件位于何处，因此忽略了nfcd.field_creation_date_value为null的情况；因此您不会在缺少月份的情况下获得结果。

请执行以下操作：

SELECT  allmonths.m,nfcd.field_creation_date_value,MONTH(nfcd.field_creation_date_value) as month
  ,s.field_source_target_id AS field_source_target_id, tfd.name AS name, tfdc.name AS tfdc_name,
  tfdr.name AS tfdr_name, max(nfcd.field_creation_date_value) AS Monat,
  COUNT(DISTINCT nfd.nid) AS IntpM, SUM(case WHEN doing.field_doings_target_id in(26) then 1 else 0 end) AS IGVB, SUM(case WHEN doing.field_doings_target_id in(27) then 1 else 0 end) AS IGDG, SUM(case WHEN doing.field_doings_target_id in(30) then 1 else 0 end) AS PTVB,SUM(case WHEN doing.field_doings_target_id in(31) then 1 else 0 end) AS PTDG,SUM(case WHEN doing.field_doings_target_id in(28) then 1 else 0 end) AS VGVB, SUM(case WHEN doing.field_doings_target_id in(29) then 1 else 0 end) AS VGDG,
  COUNT(DISTINCT case WHEN st.field_status_target_id in(33,34,35) then nfd.nid else null end) AS Onboard
FROM (
    SELECT 01 as m UNION SELECT 2 as m UNION SELECT 03 as m UNION SELECT 04 as m UNION SELECT 5 as m UNION SELECT 6 as m
    UNION SELECT 7 as m UNION SELECT 8 as m UNION SELECT 09 as m UNION SELECT 10 as m UNION SELECT 11 as m UNION SELECT 12 as m
  ) as allmonths
  left JOIN node__field_creation_date nfcd ON MONTH(nfcd.field_creation_date_value) = allmonths.m AND (nfcd.field_creation_date_value BETWEEN '2018-04-01' AND '2019-03-31')  
  LEFT JOIN node_field_data nfd ON nfd.nid = nfcd.entity_id
  INNER JOIN node__field_region r ON r.entity_id = nfd.nid
  INNER JOIN node__field_source s ON s.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfd ON tfd.tid = s.field_source_target_id
  INNER JOIN node__field_status st ON st.entity_id = nfd.nid
  LEFT OUTER JOIN node__field_onboard_vpkn vpkn ON vpkn.entity_id = nfd.nid
  INNER JOIN node__field_channel nfc ON nfc.entity_id = nfd.nid
  INNER JOIN taxonomy_term_field_data tfdr ON tfdr.tid = r.field_region_target_id
  INNER JOIN taxonomy_term_field_data tfdc ON tfdc.tid = nfc.field_channel_target_id
  LEFT OUTER JOIN node__field_doings doing ON doing.entity_id = nfd.nid
WHERE
  (type = 'candidate') AND (status = 1)
GROUP BY tfd.name, tfdc.name, tfdr.name, r.field_region_target_id, s.field_source_target_id,
  allmonths.m
#   ,YEAR(nfcd.field_creation_date_value), MONTH(nfcd.field_creation_date_value)
ORDER BY s.field_source_target_id ASC
  ,tfdc_name,tfdr_name,Monat ASC;
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