Question

我正在尝试在SQL Server中创建一个表变量，其中包含按季度分组的3列数据。我已成功为3列中的每一列选择适当的数据，但不知道如何使用每个附加查询更新表变量的内容。

因此，我不是拥有一个包含4行（每季度一个）和3列数据的表，而是在数据列中有12行（4个季度重复3次）和大量空值。

如何在没有NULLS的情况下创建表格的仅4行版本？

查询：

DECLARE @temp TABLE (oYear INT, oQuarter INT, chin FLOAT, press FLOAT, pull FLOAT)
DECLARE @sDate AS DATE, @eDate AS DATE, @athName AS VARCGAR(50), 
        @chin1RM AS FLOAT, @press1RM AS FLOAT, @pull1RM AS FLOAT;

SET @sDate = '2016-10-01';
SET @eDate = '2017-10-01';

SET @athName = 'Steve';

INSERT INTO @temp (oYear, oQuarter, chin)
    SELECT 
        DATEPART(YEAR, Day.Date), 
        DATEPART(QUARTER, Day.Date), 
        MAX(Pred1RMBMF) 
    FROM 
        GymLoad 
    JOIN 
        Session ON Session.id = GymLoad.SessionID 
    JOIN 
        Day ON Day.id = Session.DayID 
    JOIN 
        Athlete ON Athlete.id = Day.AthleteID 
    WHERE 
        (ExerciseID = 200 OR ExerciseID = 198) 
        AND FullName = @athName 
        AND Day.Date >= @sDate 
        AND Day.Date <= @eDate 
    GROUP BY 
        DATEPART(YEAR,Day.Date), DATEPART(QUARTER,Day.Date);

INSERT INTO @temp (oYear, oQuarter, press)
    SELECT 
        DATEPART(YEAR, Day.Date), 
        DATEPART(QUARTER, Day.Date), 
        MAX(Pred1RMBMF) 
    FROM 
        GymLoad
    JOIN 
        Session ON Session.id = GymLoad.SessionID 
    JOIN 
        Day ON Day.id = Session.DayID 
    JOIN 
        Athlete ON Athlete.id = Day.AthleteID 
    WHERE 
        (ExerciseID = 164 OR ExerciseID = 174) 
        AND FullName = @athName 
        AND Day.Date >= @sDate  
        AND Day.Date <= @eDate 
    GROUP BY 
        DATEPART(YEAR, Day.Date), DATEPART(QUARTER, Day.Date);

INSERT INTO @temp (oYear, oQuarter, pull)
    SELECT 
        DATEPART(YEAR, Day.Date), 
        DATEPART(QUARTER, Day.Date), 
        MAX(Pred1RMBMF) 
    FROM 
        GymLoad
    JOIN 
        Session ON Session.id = GymLoad.SessionID 
    JOIN 
        Day ON Day.id = Session.DayID 
    JOIN 
        Athlete ON Athlete.id = Day.AthleteID 
    WHERE 
        (ExerciseID = 183 OR ExerciseID = 183) 
        AND FullName = @athName 
        AND Day.Date >= @sDate  
        AND Day.Date <= @eDate 
    GROUP BY 
        DATEPART(YEAR, Day.Date), DATEPART(QUARTER, Day.Date);

SELECT * FROM @Temp

查询当前返回的结果集：

oYear   oQuarter    chin    press   pull
------------------------------------------
2017    1          104.02   NULL    NULL
2017    2          102.22   NULL    NULL
2017    3          100.54   NULL    NULL
2016    4          104.3    NULL    NULL
2017    1          NULL     81.61   NULL
2017    2          NULL     71.26   NULL
2017    3          NULL     75.86   NULL
2016    4          NULL     80      NULL
2017    1          NULL     NULL    91.95
2017    2          NULL     NULL    68.97
2017    3          NULL     NULL    73.75
2016    4          NULL NULL    85.33

非常感谢任何帮助。

Answer 1

按年和季度汇总，并在数据列上使用汇总函数（例如MAX）来删除空值。

SELECT
    oYear,
    oQuarter,
    MAX(chin) AS chin,
    MAX(press) AS press,
    MAX(pull) AS pull
FROM @Table
GROUP BY
    oYear,
    oQuarter;

SQL Server：表变量更新

1 个答案: