Question

我在SQL中有一个包含3列的表：

CategoryName
WarnInterval
ErrorInterval

然后我有另一张有4列的表：

类别名称
组名
IncludedExcluded
匹配

此表中的每一行都有2条基于CategoryName，GroupName和IncludedExcluded的唯一记录。例如，作为json，它看起来像这样：

 ctx._requestHeader().session().get("AUTH");

有3个组（Products，Reps和BusinessCategories），因此每个Category在此表中只有6行数据。我想生成一个SQL语句，将表拉入列，然后我可以将其解析为json对象，如下所示：

{
    categoryName: 'Folders',
    groupName: 'Products',
    includeExcluded: 'E',
    match: 'SomeProduct'
}, {
    categoryName: 'Folders',
    groupName: 'Products',
    includeExcluded: 'I',
    match: 'SomeOtherProduct'
}

我希望SQL语句加入2个表并将数据显示到这样的列中：

类别名称
WarnInterval
ErrorInterval
ProductTitle（这是组名）
ProductIncludes（如果IncludedExcluded值为＆＃39;我＆＃39;然后将匹配项放入此列）
ProductExcludes（如果IncludedExcluded值为＆＃39; E＆＃39;然后将匹配项放入此列）
RepresentativeTitle
RepresentativeIncludes
RepresentativeExcludes
BusinessCategoryTitle
BusinessCategoryIncludes
BusinessCategoryExcludes

我真的希望我解释得那么好。有人可以帮我解决这个问题吗？ PS，它是Oracle：）

Answer 1

也许这就是你所追求的。查询确实将category_matches表分成一组六个数据集 - 三个组*两个包含/排除标志。

您问题中的列列表包括＆＃34; ProductTitle（这是组名）＆＃34;由于每个组都在每行数据中表示，因此没有意义。但也许我误解了

WITH
 category_intervals (category_name, warn_interval, error_interval) AS 
 (SELECT 'Folders',40,60 FROM dual UNION ALL
  SELECT 'catA',10,20 FROM dual UNION ALL
  SELECT 'catB',50,100 FROM dual 
 )
,category_matches(category_name, group_name, include_exclude, match_name) AS
 (SELECT 'Folders','Products','E','Product 1' FROM dual UNION ALL
  SELECT 'Folders','Products','I','Product 2' FROM dual UNION ALL 
  SELECT 'Folders','Reps','E','Rep 1' FROM dual UNION ALL
  SELECT 'Folders','Reps','I','Rep 2' FROM dual UNION ALL 
  SELECT 'Folders','Business Categories','E','Category 1' FROM dual UNION ALL
  SELECT 'Folders','Business Categories','I','Category 2' FROM dual UNION ALL 
  --
  SELECT 'catA','Products','E','Product 3' FROM dual UNION ALL
  SELECT 'catA','Products','I','Product 4' FROM dual UNION ALL 
  SELECT 'catA','Reps','E','Rep 3' FROM dual UNION ALL
  SELECT 'catA','Reps','I','Rep 4' FROM dual UNION ALL 
  SELECT 'catA','Business Categories','E','Category 3' FROM dual UNION ALL
  SELECT 'catA','Business Categories','I','Category 4' FROM dual UNION ALL 
  --
  SELECT 'catB','Products','E','Product 5' FROM dual UNION ALL
  SELECT 'catB','Products','I','Product 6' FROM dual UNION ALL 
  SELECT 'catB','Reps','E','Rep 5' FROM dual UNION ALL
  SELECT 'catB','Reps','I','Rep 6' FROM dual UNION ALL 
  SELECT 'catB','Business Categories','E','Category 5' FROM dual UNION ALL
  SELECT 'catB','Business Categories','I','Category 6' FROM dual 
 )
SELECT
 ci.category_name
,ci.warn_interval
,ci.error_interval
,ip.match_name           product_include
,ep.match_name           product_exclude
,ir.match_name           rep_include
,er.match_name           rep_exclude
,ibc.match_name          bus_cat_include
,ibc.match_name          bus_catt_exclude
FROM
 category_intervals   ci
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Products'
  AND include_exclude = 'I'
 ) ip 
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Products'
  AND include_exclude = 'E'
 ) ep 
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Reps'
  AND include_exclude = 'I'
 ) ir 
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Reps'
  AND include_exclude = 'E'
 ) er
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Business Categories'
  AND include_exclude = 'I'
 ) ibc 
,(SELECT *
  FROM category_matches  
  WHERE group_name = 'Business Categories'
  AND include_exclude = 'E'
 ) ebc 
WHERE 1=1
AND ci.category_name = ip.category_name
AND ci.category_name = ep.category_name
AND ci.category_name = ir.category_name
AND ci.category_name = er.category_name
AND ci.category_name = ibc.category_name
AND ci.category_name = ebc.category_name
ORDER BY
 ci.category_name
;

SQL将相关表选择为新列

1 个答案: