Question

我有多个表，我正在对它们执行PiCamera。我想根据某些字段以某些字母开头的条件对它们进行分组，然后按区域对它们进行分组。这就是我的方式

JOIN

上面的代码为我提供了COUNT而不考虑区域。如果我希望每个唯一SELECT CASE WHEN PNumber LIKE 'F%' THEN 'F' WHEN PNumber LIKE 'CE%' THEN 'CE' WHEN PNumber LIKE 'CXT%' THEN 'CXT' END AS p_by_type , COUNT(*) AS p_by_count FROM ( SELECT [xml_P].Id, [xml_P].PNumber, [xml_PSR].ScopeRegion, [xml_SR].RegionCode FROM [xml_P] JOIN [xml_PSR] ON [xml_P].Id = [xml_PSR].Pol JOIN [xml_SR] ON [xml_PSR].SR = [xml_SR].Id) PWithRegions GROUP BY CASE WHEN PNumber LIKE 'F%' THEN 'F' WHEN PNumber LIKE 'CE%' THEN 'CE' WHEN PNumber LIKE 'CXT%' THEN 'CXT' END GO的每个PNumber的计数从F，CE，CXT开始，我该怎么办？那是[xml_SR].RegionCode我希望计数F，CE，CXT，然后[xml_SR].RegionCode = AMER我想要相同的等等。

执行嵌套查询：

[xml_SR].RegionCode = CH

Id，PNumber，ScopeRgion，RegionCode 1，F586,42，EMEA .. 22，CE86,42，EMEA .. 44，CXT6,42，EMEA .. 101，F56,42，EMEA .. 105，F996,43，CH .. 122，CXT186,43，CH .. 44，CXT196,43，CH .. 101，CE5556,43，CH ..

并执行完整的查询给我一个像这样的结果集：

p_by_type，p_by_count F，39 CXT，258 CE，77

我希望输出是什么

F，25，CH F，3，EMEA ..

Answer 1

您只需将RegionCode添加到GROUP BY即可。但是，您的查询过于复杂 - 不需要子查询：

SELECT (CASE WHEN p.PNumber LIKE 'F%' THEN 'F'
             WHEN p.PNumber LIKE 'CE%' THEN 'CE'
             WHEN p.PNumber LIKE 'CXT%' THEN 'CXT'
        END) as p_by_type,
       sr.RegionCode,
       COUNT(*) AS p_by_count
FROM xml_P p JOIN
     xml_PSR psr
     ON p.Id = psr.Pol JOIN
     xml_SR sr
     ON psr.SR = sr.Id
GROUP BY (CASE WHEN p.PNumber LIKE 'F%' THEN 'F'
               WHEN p.PNumber LIKE 'CE%' THEN 'CE'
               WHEN p.PNumber LIKE 'CXT%' THEN 'CXT'
          END),
         sr.RegionCode;

注意：

表别名使查询更容易编写和阅读。
不需要子查询。
您应该在SELECT和GROUP BY中包含您想要的区域代码。
如果不需要，[等转义字符的使用会使查询混乱。

Answer 2

您可以在您的选择中以及在您的组中添加RegionCode。

因此您将获得每个PNumber中每个RegionCode的计数。

SELECT
  CASE    
    WHEN PNumber LIKE 'F%' THEN 'F'
    WHEN PNumber LIKE 'CE%' THEN 'CE'
    WHEN PNumber LIKE 'CXT%' THEN 'CXT'
  END AS p_by_type
, RegionCode
, COUNT(*) AS p_by_count
FROM (
    SELECT [xml_P].Id, [xml_P].PNumber, [xml_PSR].ScopeRegion, [xml_SR].RegionCode
    FROM [xml_P]
    JOIN [xml_PSR]
    ON [xml_P].Id = [xml_PSR].Pol
    JOIN [xml_SR]
    ON [xml_PSR].SR = [xml_SR].Id) PWithRegions
GROUP BY 
  CASE
    WHEN PNumber LIKE 'F%' THEN 'F'
    WHEN PNumber LIKE 'CE%' THEN 'CE'
    WHEN PNumber LIKE 'CXT%' THEN 'CXT'
  END, RegionCode
GO

多种情况下的情况

2 个答案: