SQL子查询分析

我有一个如下表，希望基于子查询（例如sql）执行分析

从表1中选择，其中Value Param.internal>Value Param.external

这不起作用：

SELECT * FROM Table1 
WHERE [Values] IN ( 
    SELECT [Value] 
    FROM Table1 
    WHERE Param= 'internal' > 
    SELECT [Value] 
    FROM Table1 WHERE Param= 'external'
    ) 

SELECT * 
FROM Table1 
WHERE [Values] IN (SELECT [Value] 
                   FROM Table1 
                   WHERE Param= 'internal' > SELECT [Value] FROM Table1 WHERE Param= 'external') 

这不起作用：

SELECT * FROM Table1 
WHERE [Values] IN ( 
    SELECT [Value] 
    FROM Table1 
    WHERE Param= 'internal' > 
    SELECT [Value] 
    FROM Table1 WHERE Param= 'external'
    ) 

SELECT * 
FROM Table1 
WHERE [Values] IN (SELECT [Value] 
                   FROM Table1 
                   WHERE Param= 'internal' > SELECT [Value] FROM Table1 WHERE Param= 'external') 

我想你是想找一个部门，内部栏目比外部栏目大

试试这个：

select Department
    ,sum(case when Param = 'internal' then Value else 0 end) as Internal
    ,sum(case when Param = 'external' then Value else 0 end) as External
    ,sum(case when Param = 'others' then Value else 0 end) as Others
    --Added based on comment
    , (SELECT COUNT(DISTINCT Department) from Table1) as CtDistinctDept
    ,sum(Value) as DeptTotal
from table1
group by department
--optional
having sum(case when Param = 'internal' then Value else 0 end)
      > sum(case when Param = 'external' then Value else 0 end)

---

我将使用EXISTS编写查询：

SELECT *
FROM Table1 t1
WHERE Param = 'internal'
AND EXISTS
(SELECT 1
 FROM Table1 t2
 WHERE Param = 'external'
 AND t1.Department = t2.Department
 AND t1.value > t2.value)

因此，基本上返回所有行，其中：

参数=内部和外部 还有一行具有相同的部门名称，其中param=external，且外部值小于内部值 根据您上面的样本数据，第二部门将被退回

根据评论进行编辑： 如果要显示部门的所有行，只需将上面的行连接回主表，如下所示：

SELECT main.*
FROM Table1 main
INNER JOIN
(SELECT t1.Department
 FROM Table1 t1
 WHERE Param = 'internal'
 AND EXISTS
 (SELECT 1
  FROM Table1 t2
  WHERE Param = 'external'
  AND t1.Department = t2.Department
  AND t1.value > t2.value) sub
ON main.Department = sub.Department

---

你的问题是什么？您编写并发现什么代码没有提供您期望的输出？您需要透视您的Param col，然后使用where子句。看，这就是你要问的。这不起作用：从表1中选择*，其中[Value]在表1中选择[Value]，其中Param='internal'>从表1中选择[Value]，其中Param='external'，我喜欢这个方法，但它在报告中只显示“internal”参数。当条件满足时，是否可以显示所有参数？完美。谢谢你的解决方案。我已将countDistinctDepartment添加为Count，但答案始终为1。是否可以获取查询返回的所有部门的完整计数？@user3359706。不知道它有什么帮助，但我加了它。我还加了一个总数，我想你可能会要求。太好了。谢谢