基于 Kusto / 数据资源管理器中的列名列表的项目列

Question

我有一个包含数百列的 Kusto 表。大约一半的列包含日期。每个日期列的名称中都有“日期”一词（例如：“createdDate”）。我想只返回列名中包含“日期”的列。

（注意，“日期”列中的值是字符串）

我正在尝试执行以下操作：

let T1 = datatable (col1:string, col2:string, Date1:string, Date2:string)[
"abc", "def", "2021-11-3", "2021-11-4",
"ghi", "jkl", "2021-11-5", "2021-11-6",
"mno", "pqr", "2021-11-7", "2021-11-8",
"stu", "v", "2021-11-9", "2021-11-10",
"wx", "yz", "2021-11-11", "2021-11-12"];
let ColswithDates = T1
| getschema 
| where ColumnName contains "date";
T1 | project ColswithDates

Answer 1

使用“project-keep”操作符

let T1 = datatable (col1:string, col2:string, Date1:string, Date2:string)[
"abc", "def", "2021-11-3", "2021-11-4",
"ghi", "jkl", "2021-11-5", "2021-11-6",
"mno", "pqr", "2021-11-7", "2021-11-8",
"stu", "v", "2021-11-9", "2021-11-10",
"wx", "yz", "2021-11-11", "2021-11-12"];
let ColswithDates = T1
| getschema 
| where ColumnName contains "date";
T1 | project-keep *Date*

Date1	Date2
2021-11-3	2021-11-4
2021-11-5	2021-11-6
2021-11-7	2021-11-8
2021-11-9	2021-11-10
2021-11-11	2021-11-12