在下面的查询中,对于 o.EventSetName、o.EventSetDisplay、o.EventSetDescription - 任何时候结果中的 3 列有重复的 ROWS - 只应显示第一个这样的行,其余重复行留空.....
这是sql:
Select distinct top 100000 o.EventSetName,
o.EventSetDisplay,
o.EventSetDescription,
o.ChildSetName,
ROW_NUMBER() Over (Order By f.ChildSetName) RN,
f.DocumentDispSequence,
f.SectionDispSequence,
o.ObsSetDispSequence,
null
From ##ObsSetLevel o,
##Final f
Where f.ChildSetName = o.EventSetName and
o.EventSetName = @variableName
Order By RN asc, f.DocumentDispSequence asc, f.SectionDispSequence asc, o.ObsSetDispSequence asc
我没有报告工具,所以现在很多报告逻辑需要在存储过程中完成...
所以代替:
val 1 val2 val3 val7
val 1 val2 val3 val8
val 1 val2 val3 val 10
val 1 val2 val3 x
val 1 val2 val3 y
我应该得到第 2、3、4 和 5 行的前 3 列为空白的结果
最佳答案
在 CTE 中包装您的现有查询,添加 ROW_NUMBER OVER PARTITION BY
您的列,这将为每组值创建 RN。在外部查询中,只需使用 CASE 选择 GRP_RN = 1 的值,否则为空字符串。
WITH CTE AS
(
Select distinct top 100000
o.EventSetName,
o.EventSetDisplay,
o.EventSetDescription,
o.ChildSetName,
ROW_NUMBER() Over (Order By f.ChildSetName) RN,
f.DocumentDispSequence,
f.SectionDispSequence,
o.ObsSetDispSequence,
null as NullColumnNeedsName,
ROW_NUMBER() OVER (PARTITION BY o.EventSetName, o.EventSetDisplay,o.EventSetDescription ORDER BY f.ChildSetName) GRP_RN
From ##ObsSetLevel o,
INNER JOIN ##Final f ON f.ChildSetName = o.EventSetName and o.EventSetName = @variableName
)
SELECT
CASE WHEN GRP_RN = 1 THEN o.EventSetName ELSE '' END AS EventSetName,
CASE WHEN GRP_RN = 1 THEN o.EventSetDisplay ELSE '' END AS EventSetDisplay,
CASE WHEN GRP_RN = 1 THEN o.EventSetDescription ELSE '' END AS EventSetDescription,
other columns
FROM CTE
Order By RN asc, DocumentDispSequence asc, SectionDispSequence asc, o.ObsSetDispSequence asc
PS:我还更正了您对旧式连接的使用。随着 SQL-92 标准的引入,这种用法在 20 多年前就已经过时了。 You should avoid using them.
关于sql - 显示结果集中重复值的空白,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18767504/