将数据从聚合级别更改为粒度级别

Question

我的数据是这样的：

重现：

    DROP TABLE IF EXISTS SALARY;
    CREATE TEMP TABLE salary
    (
     Employee varchar(100),
     Salary1 numeric(38,12),
     Salary2 numeric(38,12)
    );
   INSERT INTO salary (Employee, Salary1 ,Salary2)
   VALUES ('A1',100,300),('A2',200,300),('A3',300,450),('A4',400,600);

我想将它平均划分（因为我们将 2 天的工资数据汇总到 1 列中）并将其转换为如下的每日级别数据：

因此，如果您看到员工 A2 - 第 3 天和第 4 天的薪水总和为 300（第 2 天的 150+150 table）。任何 help/leads 表示赞赏。

Answer 1

物化 calendar table with the desired dates will facilitate generating the dates needed for the query. Without one, a tally table 或 CTE（如下例所示）是另一种方法。

DECLARE
      @StartDate date = '2022-05-01'
    , @DaysPerSalary int = 2;
WITH
     t10 AS (SELECT n FROM (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) t(n))
    ,tally AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT 0)) AS num  FROM t10 AS a CROSS JOIN t10 AS b CROSS JOIN t10 AS c)
    ,salary1 AS (
        SELECT Employee, Salary1 / @DaysPerSalary AS Salary
        FROM SALARY
    )
    ,salary2 AS (
        SELECT Employee, Salary2 / @DaysPerSalary AS Salary
        FROM SALARY
    )
SELECT DATEADD(day, tally.num-1, @StartDate), Employee, Salary
FROM tally
CROSS JOIN salary1
WHERE tally.num <= @DaysPerSalary
UNION ALL
SELECT DATEADD(day, tally.num-1 + @DaysPerSalary, @StartDate), Employee, Salary
FROM tally
CROSS JOIN salary2
WHERE tally.num <= @DaysPerSalary
ORDER BY Employee, Salary;

将数据从聚合级别更改为粒度级别

Change data from aggregated to granular level

sql

sql-server

aggregation-framework

aggregate-functions