我希望在使用 pivot table 和动态列名的查询中使用 0 而不是空值

Question

此查询returns 每个客户的销售额按周和年分布。这样我就可以得到不同年份的结果，而无需在同一周内混合不同年份的销售额。

但是我在没有数据显示的那几周得到了 NULL 个值，而是想得到 0。查询如下：

    DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
    DECLARE @ColumnName AS NVARCHAR(MAX)

    --Get distinct values of the PIVOT Column 
    SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
    + QUOTENAME(courses.anomes)
    FROM 
    (
    SELECT DISTINCT right('0'+ltrim(rtrim(str(datepart(week,ft.fdata))))+'/'+ltrim(rtrim(str(ft.ftano))),7) anomes FROM ft where ftano=2015 
    ) Courses
    order by anomes

    --Prepare the PIVOT query using the dynamic 
    SET @DynamicPivotQuery = 
      N'SELECT nome, ' + @ColumnName + '
        FROM 
        (
        select nome,
right('+'''0'''+'+ltrim(rtrim(str(datepart(week,ft.fdata))))+'+'''/'''+'+ltrim(rtrim(str(ft.ftano))),7) anomes,etotal from ft where ftano=2015
        ) p
PIVOT(SUM(Etotal) 
      FOR anomes IN (' + @ColumnName + ')) AS PVTTable'
      --Execute the Dynamic Pivot Query
      EXEC sp_executesql @DynamicPivotQuery

Answer 1

类似于 @ColumnName，创建一个选择 ISNULL(pivot_col,0) 的 @ColumnNameSelect 并在您的 SELECT 子句中使用它。

更新由于缺少一些基本信息（例如 ft table），我无法测试我回答的内容。我使用 STUFF 重写了 @ColumnNameSelect，这是一种更好的方法。您也应该将这种工作方式应用于构建 @ColumnName 列表。为了测试这个，我创建了一个临时的 table #ft 来代替你的 ft table。运行将脚本中的 #ft AS ft 替换为 ft。

CREATE TABLE #ft(fdata DATETIME,ftano INT,nome VARCHAR(256),etotal INT); 
INSERT INTO #ft(fdata,ftano,nome,etotal)VALUES
    ('20151220',2015,'nome1',16),
    ('20151201',2015,'nome2',9),
    ('20151116',2015,'nome3',25),
    ('20151010',2015,'nome4',11);

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX);
DECLARE @ColumnName AS NVARCHAR(MAX);

--Get distinct values of the PIVOT Column 
SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
+ QUOTENAME(courses.anomes)
FROM 
(
SELECT DISTINCT right('0'+ltrim(rtrim(str(datepart(week,ft.fdata))))+'/'+ltrim(rtrim(str(ft.ftano))),7) anomes FROM #ft AS ft where ftano=2015 
) Courses
order by anomes

DECLARE @ColumnNameSelect AS NVARCHAR(MAX)
SELECT @ColumnNameSelect=STUFF((
    SELECT
    ',ISNULL('+QUOTENAME(courses.anomes)+',0) AS '+QUOTENAME(courses.anomes)
    FROM 
    (
    SELECT DISTINCT right('0'+ltrim(rtrim(str(datepart(week,ft.fdata))))+'/'+ltrim(rtrim(str(ft.ftano))),7) anomes FROM #ft AS ft where ftano=2015 
    ) Courses
    order by anomes
    FOR XML PATH('')
    ),1,1,'');
PRINT @ColumnNameSelect

--Prepare the PIVOT query using the dynamic 
SET @DynamicPivotQuery = 
    N'SELECT nome, ' + @ColumnNameSelect + '
    FROM 
    (
    select nome,
right('+'''0'''+'+ltrim(rtrim(str(datepart(week,ft.fdata))))+'+'''/'''+'+ltrim(rtrim(str(ft.ftano))),7) anomes,etotal from #ft AS ft where ftano=2015
    ) p
PIVOT(SUM(Etotal) 
    FOR anomes IN (' + @ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery;

DROP TABLE #ft;

打印出来：

+-------+---------+---------+---------+---------+
| nome  | 41/2015 | 47/2015 | 49/2015 | 52/2015 |
+-------+---------+---------+---------+---------+
| nome1 |       0 |       0 |       0 |      16 |
| nome2 |       0 |       0 |       9 |       0 |
| nome3 |       0 |      25 |       0 |       0 |
| nome4 |      11 |       0 |       0 |       0 |
+-------+---------+---------+---------+---------+

我希望在使用 pivot table 和动态列名的查询中使用 0 而不是空值

I want 0s instead of null values in query using pivot table and dynamic column names

tsql

sql-server

pivot