Primary keys
The following
Power Query program creates a table with a primary key:
let
tab = #table(
{"id", "val 1", "val 2"}, {
{ 1 , "one" , "foo" },
{ 2 , "two" , "bar" },
{ 3 , "three", "baz" }
}),
tab_pk = Table.AddKey(
tab,
{"id"},
true
)
in
tab_pk
PKs are not enforced
Unfortunately, Power Query does not enforce (or check) primary keys. The last record should be rejected, imho, because the id 2 is already used. However, the program just runs fine:
let
tab = #table(
{"id", "val 1", "val 2"}, {
{ 1 , "one" , "foo" },
{ 2 , "two" , "bar" },
{ 3 , "three", "baz" },
{ 2 , "uh oh", "!" }
}),
tab_pk = Table.AddKey(
tab,
{"id"},
true
)
in
tab_pk