Question

我使用相同的格式来处理我在其他SO用户的帮助下开发的其他几个SQL查询。它在没有太多行的表上运行得非常好，但是我现在正在努力使这个查询能够处理3个表，每个表有大约65K行。查询还没有完成运行（我让它在后台运行，而我在处理其他事情，并在大约8小时后放弃）。相同的查询在几分钟内在大约20K行的表上运行。我尝试在连接字段的表上创建索引（包含多个字段的1个索引和单独的单个字段索引）但仍然没有运气。我想知道是否有其他方法可以优化此查询，或者我可以采取另一种方法来获得类似的结果。

SELECT a.PART_KIT_ID, `PART_KIT_NAME`,`EXTERNAL_SYS_PART_ID`, `ATA_NUMBER`, `PART_KIT_DESC`, `ACTIVE_IND`, `Flag NameA`, `Parameter Name`, `Flag NameB`, `AutoCAT`, `ICAM`, `ICAM_PRIOR`
 from (SELECT b.PART_KIT_ID
, CASE WHEN b.CTLG_VER_ID <> c.CTLG_VER_ID and b.CTLG_VER_ID <> a.CTLG_VER_ID THEN 'CTLG VER ID FLAG A' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.CTLG_VER_ID = c.CTLG_VER_ID and b.CTLG_VER_ID <> a.CTLG_VER_ID THEN 'CTLG VER ID FLAG B' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`
, 'CTLG_VER_ID' `Parameter Name`
, a.CTLG_VER_ID `AutoCAT`
, b.CTLG_VER_ID `ICAM`
, c.CTLG_VER_ID `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID 
UNION ALL
SELECT b.PART_KIT_ID 
, CASE WHEN b.CTLG_NAME <> c.CTLG_NAME and b.CTLG_NAME <> a.CTLG_NAME THEN 'CTLG NAME FLAG A' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.CTLG_NAME = c.CTLG_NAME and b.CTLG_NAME <> a.CTLG_NAME THEN 'CTLG NAME FLAG B' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`
, 'CTLG_NAME' `Parameter Name`  
, a.CTLG_NAME `AutoCAT`
, b.CTLG_NAME `ICAM`
, c.CTLG_NAME `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.PART_KIT_NAME <> c.PART_KIT_NAME and b.PART_KIT_NAME <> a.PART_KIT_NAME THEN 'PART KIT NAME FLAG A' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.PART_KIT_NAME = c.PART_KIT_NAME and b.PART_KIT_NAME <> a.PART_KIT_NAME THEN 'PART KIT NAME FLAG B' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'PART_KIT_NAME' `Parameter Name`
, a.PART_KIT_NAME `AutoCAT`
, b.PART_KIT_NAME `ICAM`
, c.PART_KIT_NAME `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.ATTRIB_ID <> c.ATTRIB_ID and b.ATTRIB_ID <> a.ATTRIB_ID THEN 'ATTRIB_ID FLAG A' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.ATTRIB_ID = b.ATTRIB_ID and b.ATTRIB_ID <> a.ATTRIB_ID THEN 'ATTRIB_ID ID FLAG B' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'ATTRIB_ID' `Parameter Name`
, a.ATTRIB_ID `AutoCAT`
, b.ATTRIB_ID `ICAM`
, c.ATTRIB_ID `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.ATTRIB_NAME <> c.ATTRIB_NAME and b.ATTRIB_NAME <> a.ATTRIB_NAME THEN 'ATTRIB_NAME FLAGA' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.ATTRIB_NAME = c.ATTRIB_NAME and b.ATTRIB_NAME <> a.ATTRIB_NAME THEN 'ATTRIB_NAME FLAGB' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'ATTRIB_NAME' `Parameter Name`
, a.ATTRIB_NAME `AutoCAT`
, b.ATTRIB_NAME `ICAM`
, c.ATTRIB_NAME `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.ATTRIB_DESC <> c.ATTRIB_DESC and b.ATTRIB_DESC <> a.ATTRIB_DESC THEN 'ATTRIB_DESC FLAGA' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.ATTRIB_DESC = c.ATTRIB_DESC and b.ATTRIB_DESC <> a.ATTRIB_DESC THEN 'ATTRIB_DESC FLAGB' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'ATTRIB_DESC' `Parameter Name`
, a.ATTRIB_DESC `AutoCAT`
, b.ATTRIB_DESC `ICAM`
, c.ATTRIB_DESC `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.ATTRIB_VALUE <> c.ATTRIB_VALUE and b.ATTRIB_VALUE <> a.ATTRIB_VALUE THEN 'ATTRIB_VALUE FLAGA' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.ATTRIB_VALUE = c.ATTRIB_VALUE and b.ATTRIB_VALUE <> a.ATTRIB_VALUE THEN 'ATTRIB_VALUE FLAGB' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'ATTRIB_VALUE' `Parameter Name`
, a.ATTRIB_VALUE `AutoCAT`
, b.ATTRIB_VALUE `ICAM`
, c.ATTRIB_VALUE `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID 
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.EXTERNAL_SYS_PART_ID <> c.EXTERNAL_SYS_PART_ID and b.EXTERNAL_SYS_PART_ID <> a.EXTERNAL_SYS_PART_ID THEN 'EXTERNAL_SYS_PART_ID FLAGA' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and b.EXTERNAL_SYS_PART_ID <> a.EXTERNAL_SYS_PART_ID THEN 'EXTERNAL_SYS_PART_ID FLAGB' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'EXTERNAL_SYS_PART_ID' `Parameter Name`
, a.EXTERNAL_SYS_PART_ID `AutoCAT`
, b.EXTERNAL_SYS_PART_ID `ICAM`
, c.EXTERNAL_SYS_PART_ID `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID
UNION ALL
SELECT b.PART_KIT_ID
, CASE WHEN b.PART_KIT_ID <> c.PART_KIT_ID and b.PART_KIT_ID <> a.PART_KIT_ID THEN 'PART_KIT_ID FLAGA' ELSE NULL END AS `Flag NameA`
, CASE WHEN b.PART_KIT_ID = c.PART_KIT_ID and b.PART_KIT_ID <> a.PART_KIT_ID THEN 'PART_KIT_ID FLAGB' ELSE NULL END AS `Flag NameB`
, a.PART_KIT_NAME `PART_KIT_NAME`
, d.ATA_NUMBER `ATA_NUMBER`
, d.EXTERNAL_SYS_PART_ID `EXTERNAL_SYS_PART_ID`
, d.PART_KIT_DESC `PART_KIT_DESC`
, d.ACTIVE_IND `ACTIVE_IND`  
, 'PART_KIT_ID' `Parameter Name`
, a.PART_KIT_ID `AutoCAT`
, b.PART_KIT_ID `ICAM`
, c.PART_KIT_ID `ICAM_PRIOR`
FROM cost_part_kit_attrib_ctlg_pq_acat a
JOIN cost_part_kit_attrib_ctlg_pq_icam b ON a.EXTERNAL_SYS_PART_ID = b.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = b.ATTRIB_ID
JOIN cost_part_kit_attrib_ctlg_pq_icam_prior c on a.EXTERNAL_SYS_PART_ID = c.EXTERNAL_SYS_PART_ID and a.ATTRIB_ID = c.ATTRIB_ID
LEFT OUTER JOIN acat_attribute d on a.ACAT_PART_KIT_ID = d.AUTOCAT_PART_KIT_ID 
  ) a
  ORDER BY PART_KIT_ID

最初我曾想过使用Unpivot，但由于我将使用的字段数量而被建议不要这样做。爱的建议/建议会嘲笑专家！

Answer 1

所以，我花了一些时间来看看我的连接，试图确保它们真的有意义 - 我意识到我的左外连接正在加入一个没有其他字段那么有意义的字段。我的查询现在运行1分16秒！

如何加速MySQL Select Case查询

1 个答案: