提取具有多个日期的行的最小最大日期

Posted 2023-04-14

【中文标题】提取具有多个日期的行的最小最大日期

【英文标题】：Extract min max date of a row with multiple dates

【发布时间】：2020-01-25 17:19:09

【问题描述】：

如何拆分位于多盘日期行中的最小和最大日期

这是在 Power Query 中

8/31/2018, 8/29/2018, 4/9/2018, 8/29/2018, 8/29/2018

导致不同的列

min            max
29/8/2019      4/9/2019

谁能帮我弄清楚？

代码： = Table.TransformColumns(#"Added Custom4", "FechaFinalTarea", each Text.Combine(List.Transform(_, Text.From), ", "), type text)

enter image description here

完整代码： 让 来源 = Etapa_1_Caricam， #"Grouped Rows" = Table.Group(Source, "Num Form", "mynewtable", each _, type table [Num Form=text, DupForm=text, Creado En=date, FechaCreac=date, SLA = 编号，发起者名称 = 文本，业务单位 = 文本，BU 描述 = 文本，提示表单 = 文本，描述 = 文本，文本 tarea = 文本，字段 12 = 编号，任务分配 = 文本，状态 = 编号]） , #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Task_Etapa1", each Table.Column([mynewtable],"Texto tarea")), #"Extracted Values" = Table.TransformColumns(#"Added Custom", "Task_Etapa1", each Text.Combine(List.Transform(, Text.From), ", "), type text), #"Added Custom1" = Table.AddColumn(#"Extracted Values", "Iniciador", each Table.Column([mynewtable],"Initiator Name")), #"Extracted Values1" = Table.TransformColumns(#"Added Custom1", "Iniciador", each Text.Combine(List.Transform(, Text.From), ", "), type text), #"Extracted Text Before Delimiter" = Table.TransformColumns(#"Extracted Values1", "Iniciador", each Text.BeforeDelimiter(, ", "), type text), #"Added Custom2" = Table.AddColumn(#"Extracted Text Before Delimiter", "Custom", each Table.Column([mynewtable],"Descripción del proyecto")), #"Extracted Values2" = Table.TransformColumns(#"Added Custom2", "Custom", each Text.Combine(List.Transform(, Text.From), ", "), type text), #"Inserted Text Before Delimiter" = Table.AddColumn(#"Extracted Values2", "Text Before Delimiter", each Text.BeforeDelimiter([Custom], ","), type text), #"Removed Columns" = Table.RemoveColumns(#"Inserted Text Before Delimiter","Custom"), #"Renamed Columns" = Table.RenameColumns(#"Removed Columns","Text Before Delimiter", "Description del Proyecto"), #"Added Custom3" = Table.AddColumn(#"Renamed Columns", "FechaInicio", each Table.Column([mynewtable],"Creado En")), #"Extracted Values3" = Table.TransformColumns(#"Added Custom3", "FechaInicio", each Text.Combine(List.Transform(, Text.From), ", "), type text), #"Inserted Text Before Delimiter1" = Table.AddColumn(#"Extracted Values3", "Text Before Delimiter", each Text.BeforeDelimiter([FechaInicio], ", "), type text), #"Inserted Text After Delimiter" = Table.AddColumn(#"Inserted Text Before Delimiter1", "Text After Delimiter", each Text.AfterDelimiter([FechaInicio], ", "), type text), #"Removed Columns1" = Table.RemoveColumns(#"Inserted Text After Delimiter","Text After Delimiter", "Text Before Delimiter"), #"Extracted Text Before Delimiter1" = Table.TransformColumns(#"Removed Columns1", "FechaInicio", each Text.BeforeDelimiter(, ", "), type text), #"Added Custom4" = Table.AddColumn(#"Extracted Text Before Delimiter1", "FechaFinalTarea", each Table.Column([mynewtable],"FechaCreac")), #"Extracted Values4" = Table.TransformColumns(#"Added Custom4", "FechaFinalTarea", each Text.Combine(List.Transform(_, Text.From), ", "), type text) 在 #"提取值4"

【参考方案1】：

您的输入数据中没有日期 29/8/2019（或与 2019 年相关的任何日期）。您还以day/month/year 的形式展示了您的“结果”之一。这可能只是几个拼写错误，但会使您的“结果”和问题都不清楚且难以理解。

如果我理解正确，以下方法之一应该可以工作。

---

如果您的初始表格如下所示（其中所有日期均采用month/day/year 格式并且是单个逗号分隔字符串的一部分）：

然后我得到这个输出（注意列 min 和 max）：

使用此代码：

let
    initialTable = Table.FromRows("8/31/2018, 8/29/2018, 4/9/2018, 8/29/2018, 8/29/2018"),
    split = Table.AddColumn(initialTable, "datesToCheck", each List.Transform(Text.Split([Column1], ","), each Date.FromText(_, "en-US")), type list),
    minAndMax = Table.AddColumn(split, "toExpand", each [min = List.Min([datesToCheck]), max = List.Max([datesToCheck])], type record),
    expanded = Table.ExpandRecordColumn(minAndMax, "toExpand", "min", "max")
in
    expanded

---

但是，如果您的初始表格如下所示（日期在它们自己的列中开始）：

然后我得到这个输出（注意列 min 和 max）：

使用下面的代码：

let
    initialTable = Table.FromRows(List.Transform("8/31/2018", "8/29/2018", "4/9/2018", "8/29/2018", "8/29/2018", each Date.FromText(_, "en-US"))),
    split = Table.AddColumn(initialTable, "datesToCheck", each Record.FieldValues(_), type list),
    minAndMax = Table.AddColumn(split, "toExpand", each [min = List.Min([datesToCheck]), max = List.Max([datesToCheck])], type record),
    expanded = Table.ExpandRecordColumn(minAndMax, "toExpand", "min", "max")
in
    expanded

---

根据您的代码，您的表似乎包含一个表列（称为mynewtable），其中有一个名为FechaCreac 的列，它本身包含日期。我无法对此进行测试，但我建议您在代码中替换这些行：

  #"Added Custom4" = Table.AddColumn(#"Extracted Text Before Delimiter1", "FechaFinalTarea", each Table.Column([mynewtable],"FechaCreac")),
  #"Extracted Values4" = Table.TransformColumns(#"Added Custom4", "FechaFinalTarea", each Text.Combine(List.Transform(_, Text.From), ", "), type text)
in
  #"Extracted Values4"

与：

  #"Added Custom4" = Table.AddColumn(#"Extracted Text Before Delimiter1", "FechaFinalTarea", each let dates = Table.Column([mynewtable],"FechaCreac") in [min = List.Min(dates), max = List.Max(dates)]),
  expanded = Table.ExpandRecordColumn(#"Added Custom4", "FechaFinalTarea", "min", "max")
in
  expanded

然后应该会显示min 和max 列。

【讨论】：

嗨，谢谢您的回答，我已经尝试过，使用您发送的代码并且它运行良好，但是当我在我的初始表中执行它时它不起作用。这是我的代码

@BenCruz，如果您在问题中包含您的代码，我会尝试看看它为什么不起作用。

@BenCruz，看到我回答的结尾，看看我认为你需要做哪些替换。