this poll is interesting:
Labour: 33.7
Hoyre: 20.1
Centre: 14.3
Progress: 11.1
Christian Democrats: 5.1
Venstre: 4.3
Socialist Left: 4.1
Red: 2.8
Greens: 2.7
Compared to the 2013 election and the local elections in 2015:
Poll 2017 2015 ch 2013 ch
AP: 33.7 33.6 +0.1 30.8 +2.9
H: 20.1 23.4 -3.3 26.8 -6.7
SP: 14.3 8.0 +6.3 5.5 +8.8
FrP: 11.1 10.3 +0.8 16.3 -5.2
KrF: 5.1 5.6 -0.5 5.6 -0.5
V: 4.3 5.0 - 0.7 5.2 -0.9
SV: 4.1 4.0 +0.1 4.1 0.0
Rødt: 2.8 2.2 +0.6 1.1 +1.7
MdG: 2.7 5.0 -2.3 2.8 -0.1
so some fairly big changes, but largely similar to the local elections 2 years ago, the big exception being a drop for the Greens, although their share in polling did increase in the run up to the last election.
apart from their spike in 1993 in the run up to the EU referendum, SP haven't done this well since the 1970s