Forum Discussion
How to remove and add keys? Table.ReplaceKeys how does it work?
Hi richard-powerbi ,
It seems to change key, you could try below M code and refer to power-query-m-primer-part13-tables-table-think-ii and this post for details.
let Source = #table( {"CompanyID", "Name", "Location"}, { {1, "ABC Company", "Chicago"}, {2, "ABC Company", "Charlotte"}, {3, "Some Other Company", "Cincinnati"} } ), KeysTagged = Table.AddKey(Source, {"CompanyID"}, true), aa=Table.ReplaceKeys( KeysTagged, { [Columns = {"Location"}, Primary = true] } ) in Table.Keys(aa)Best Regards,
Zoe ZhiIf this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi richard-powerbi ,
It seems to change key, you could try below M code and refer to power-query-m-primer-part13-tables-table-think-ii and this post for details.
let
Source = #table(
{"CompanyID", "Name", "Location"},
{
{1, "ABC Company", "Chicago"},
{2, "ABC Company", "Charlotte"},
{3, "Some Other Company", "Cincinnati"}
}
),
KeysTagged = Table.AddKey(Source, {"CompanyID"}, true),
aa=Table.ReplaceKeys(
KeysTagged,
{
[Columns = {"Location"},
Primary = true]
}
)
in
Table.Keys(aa)
Best Regards,
Zoe Zhi
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Another question, is below code correct if I want two columns to act as one composite key? Both columns do not have unique values, only the combination of them is unique.
= Table.ReplaceKeys(Source, {[Columns = List.Combine({{"Column1"}, {"Column2"}), Primary = true]})Later on I will merge on these two columns and I would like this utilize this for performance. Does above code work for this?
Anyone knows?
- Hi richard-powerbi,
You could simplify it as
... {[Columns = {"Column1", "Column2"}, Primary = true]})
and as long as it's unique you should see some performance improvements.
