scenario is sccm 2012 r2 with cu4 and sql 2012 r2 enterprise edition how to upgrade into sccm 2012 sp2 or sccm 2012 r2 sp1 need to upgrade sql 2012? if yes what are the steps needs to follow to upgrade sql and sccm

Do You want to upgrade to SQL 2014?

Also, could You describe existing SCCM hierarchy?

no i don't want to upgrade into sql 2014 i am looking if any possaiblity to upgrade sql 2012 r2 enterprise into service pack? and sccm 2012 sp2 or sccm 2012 r2 sp1

Hi,

If you want to upgrade your sccm 2012 R2 to R2 SP1, please download it from TechNet Evaluation Center.

https://scottbreen.wordpress.com/2015/05/15/configmgr-2012-r2-sp1-released/

Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

Thanks then what about sql server need to upgrade now i am using remote sql 2012  server enterprise edition so needs to update  cumulative  update or service pack for sql

sccm ghost, the minimum supported SQL versions are listed here: https://technet.microsoft.com/en-us/library/gg682077.aspx#BKMK_SupConfigSQLDBconfig. Just make sure that your SQL server fulfills those requirements.