1. Study leave
there is no official system in Denmark on study leaves.
you have no claim or right to take leave from a job to study and keep the possibility to come back to the same job or receive unemployment benefits.
It is opposite the case of pregnancy, where both men and women can take leave here i Denmark and both be sure to come back to same job and also receive unemployment benefits during leave.
So to take study leave you must agree with your employer.
You can always quit job and start study - in this case you will receive the same amount in study-benefits that every student in Denmark gets (DKK 5.941/month before tax, if you live way from your parents).
Also international students can get this study-benefits if they study here in Denmark, but it is an additional requirement that they must have 10 hours of study-job/week (paid job is ok).
You can get study-benefits for up to 5 years.
You can read more about The Danish students' Grants and Loans Scheme here: http://www.su.dk/english/
You can NOT get unemployments benefits from your A-kasse during study (if you participate in education which can provide study-benefits as mentioned above - and thats about 99% of alle educations in DK).
2. A-kasse membership
how long to be member for being eligible for unemployment benefits?
As earner/you have paid job: you must be member of an A-kasse for one year and have worked for 1.924 hours during the last 3 years.
As graduate: there is special rule for graduates. You have to sign up for a-kasse at latest 14 days after ending study. If you do that you can receive unemployments benefits one month after ending study.
If you have been member of an A-kasse at least the last year of your study (it is free for students) then you get benefits from DAY 1 after study.
3. Difference between different A-kasses?
regarding your rights to get unemploument benefits, the amount you get and the requirements herefor - it is stated in the law and is the same for all 26 A-kasser in Denmark.
Where Unemployment funds (A-kasser) differ from one another is the price, whether they are open to all, whether they also offer UNION together with A-kasse and whether they offer additional services in form of extra
insurance, network, help with cv and application, discounts with businesspartners etc.
Hope it helps you, please write again if not..