Table.Unpivot

Table.Unpivot(table as table, pivotColumns as list, attributeColumn as text, valueColumn as text) as table

将表中的一组列转换为属性-值对，并与每行中的剩余值相结合。

示例:

选取表 ({[ key = "x", a = 1, b = null, c = 3 ], [ key = "y", a = 2, b = 4, c = null ]}) 中的列 "a"、"b" 和 "c"，并将它们逆透视为属性-值对。

使用情况:

Table.Unpivot(Table.FromRecords({[ key = "x", a = 1, b = null, c = 3 ], [ key = "y", a = 2, b = 4, c = null ]}), { "a", "b", "c" }, "attribute", "value")

输出:

Table.FromRecords({ [ key = "x", attribute = "a", value = 1 ], [ key = "x", attribute = "c", value = 3 ], [ key = "y", attribute = "a", value = 2 ], [ key = "y", attribute = "b", value = 4 ] })