Table.Unpivot
Table.Unpivot(table as table, pivotColumns as list, attributeColumn as text, valueColumn as text) as table
Tłumaczy zestaw kolumn w tabeli na pary atrybut-wartość w połączeniu z resztą wartości w każdym wierszu.
Weź kolumny "a", "b" i "c" w tabeli ({[ key = "x", a = 1, b = null, c = 3 ], [ key = "y", a = 2, b = 4, c = null ]})
, a następnie usuń ich przewrotnie do par atrybut-wartość.
Użycie
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"
)
Wyjście
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]
})