Question

数据以以下格式存储，父代码可以有零个或多个子代。显示父母和子女的状态。问题是，使用SQL查询，我们可以仅消除状态和子状态已关闭的父级。例如对于下面的示例，只需消除P1和p4。

ParentCode ChildCode ParentStatus ChildStatus
P1           0         Closed       Closed
P1           C1        Closed       Closed
P2           0         Closed       Closed
P2           C2        Closed       Open
P3           0         Open         Closed
P3           C3        Open         Open
P4           0         Closed       Closed
P5           0         Open         Closed

Answer 1

如果我理解正确，则可以尝试使用OUTPUT子查询来消除。

INSERT

sqlfiddle

编辑

您可以尝试将not exists与SELECT * FROM T t1 where not exists ( select 1 from T tt where tt.ParentStatus = t1.ParentStatus and tt.ParentStatus = 'Closed' and tt.ChildStatus = t1.ChildStatus and tt.ChildStatus = 'Closed' )一起使用，以根据您的评论做出期望，

CTE

sqlfiddle

Answer 2

使用以下查询，

select * from Table
where ParentStatus <> 'Closed' OR ChildStatus <> 'Closed'

Answer 3

我认为简单聚合适用于此数据结构：

$Foldersize = "{0:N2} MB" -f ((Get-ChildItem -LiteralPath $Folder -Force -Recurse -EV +err -EA Continue | Measure-Object -Property Length -Sum).Sum / 1MB)

SQL查询-消除记录

3 个答案: