比较两个 select 语句的结果

Question

如何比较 TSQL (2014) 中两个 select 语句的结果？

我的两个查询：

SELECT CallDisposition, count(CallDisposition) as Count
  FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
  where (DateTime between dateadd(minute,@timespan,convert(datetime2,(GETDATE())+ @count)) AND convert(datetime2,(GETDATE())+ @count))
  Group by CallDisposition

SELECT CallDisposition, count(CallDisposition) as Count
  FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
  where DateTime >= dateadd(minute,@timespan,convert(datetime2,(GETDATE())))
  Group by CallDisposition

查询 1 的结果：

+-----------------+-------+
| CallDisposition | Count |
+-----------------+-------+
|               2 |     2 |
|               3 |     8 |
|               4 |     8 |
|               7 |    21 |
|              10 |    16 |
|              13 |   738 |
|              14 |    45 |
|              15 |    14 |
|              19 |     8 |
|              28 |    41 |
|              29 |    12 |
|              52 |    76 |
|              55 |    1  |
+-----------------+-------+

查询 2 的结果：

+-----------------+-------+
| CallDisposition | Count |
+-----------------+-------+
|               2 |     4 |
|               3 |     7 |
|               4 |     6 |
|               6 |     2 |
|               7 |    22 |
|              10 |     6 |
|              13 |   703 |
|              14 |    67 |
|              15 |    11 |
|              19 |     4 |
|              26 |     1 |
|              28 |    62 |
|              29 |    10 |
|              52 |    79 |
+-----------------+-------+

后面的主要问题，两次查询的结果可能不同。基于以上示例：查询 1 中缺少 CallDisposition 6 和 26。查询 2 中缺少 CallDispoition 55 注意：可以预期 CallDispoition 值 0-100，也许这有帮助？！

预期结果应如下所示：

+-----------------+-------+
| CallDisposition | Count |
+-----------------+-------+
| 2               |     2 |
| 3               |     1 |
| 4               |     2 |
| 6               |     2 |
| 7               |     1 |
| 10              |    10 |
| ..              |       |
| ..              |       |
| ..              |       |
| 52              |     3 |
| 55              |     1 |
+-----------------+-------+

Answer 1

老实说，我对您的预期结果感到困惑，并且比较了结果。所以我的解决方案不会产生这样的结果。但也许它可以帮助您指出正确的方向。

您可以在 calldisposition 上完全加入结果。这样，共存的 calldisposition 将被并排放置。如果一个结果中的 calldisposition 在另一个结果中不存在，则另一个的列将全部为 NULL.

SELECT *
       FROM (SELECT calldisposition,
                    count(CallDisposition) count
                    FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
                    WHERE (datetime BETWEEN dateadd(minute, @timespan, convert(datetime2, (getdate()) + @count))
                                            AND convert(datetime2, (getdate()) + @count))
                    GROUP BY calldisposition) x
            FULL JOIN (SELECT calldisposition,
                              count(calldisposition) count
                              FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
                              WHERE datetime >= dateadd(minute, @timespan, convert(datetime2, (getdate())))
                       GROUP BY calldisposition) y
                      ON y.calldisposition = x.calldisposition;

Answer 2

我可能会将结果插入临时 table，然后进行查询。使用 table 变量：

DECLARE @Results TABLE ([Source] VARCHAR(10), CallDisposition INT, [CallCount] INT)

（使用 CallCount 因为它不是保留字）

INSERT INTO @Results(CallDisposition , CallCount, [Source])
SELECT CallDisposition, count(CallDisposition) as Count, [Source] = 'Query1',
  FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
  where (DateTime between dateadd(minute,@timespan,convert(datetime2,(GETDATE())+ @count)) AND convert(datetime2,(GETDATE())+ @count))
  Group by CallDisposition

重复您的第二个查询，设置 Source = 'Query2'（或在上面的插入中与它合并）。

现在您可以检查您的@Results：

SELECT r1.* FROM @Results r1 
WHERE [Source] = 'Query1'
AND NOT EXISTS (SELECT 'X' FROM @Results r2 WHERE [Source] = 'Query2' AND r2.CallDisposition = r1.CallDisposition)

（仅供参考；可能不是最有洞察力的）

请原谅任何轻微的语法错误；我面前没有 SQL 服务器。

Answer 3

WITH S1 AS (SELECT CallDisposition, count(CallDisposition) as Count
  FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
  where (DateTime between dateadd(minute,@timespan,convert(datetime2,(GETDATE())+ @count)) AND convert(datetime2,(GETDATE())+ @count))
  Group by CallDisposition
)
,S2 AS (
SELECT CallDisposition, count(CallDisposition) as Count
  FROM [bs_Reporting].[dbo].[Termination_Call_Detail]
  where DateTime >= dateadd(minute,@timespan,convert(datetime2,(GETDATE())))
  Group by CallDisposition
)
Select ISNULL(S1.CallDisposition,S2.CallDisposition) AS CallDisposition
      ,ABS(ISNULL(S1.COUNT,0)-ISNULL(S2.Count,0)) Count
FROM S1 FULL JOIN S2
      ON S1.CallDisposition=s2.CallDisposition

比较两个 select 语句的结果

Compare results of two selects statements

sql

tsql

sql-server

sql-server-2014