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SAP EHP7 Upgrade

Hi, We are upgrading our ECC EHP7 to latest version, current SAP version is SAP ECC EHP5 SP 9. To goto the latest version we need to upgrade SQL server into 2012, in order to do sql upgrade we need to be in SAP ECC EHP5 SP 11. SQL upgrade depends on ECC patch, ECC upgrade depends on SQL upgrade. Now we have two approaches 1. Upgrade SAP ECC EHP7 SP5 (minimum requirement for SQL 2012) - SQL upgrade - patch SAP ECC EHP7 to latest 2. Patch ECC EHP5 SP9 to latest version or SP11 - SQL upgrade - Upgrade SAP ECC EHP7 latest version May I know which approach we can execute in shortest duration? In either approaches we have two options Option 1 (a) SAP Upgrade / patch, user test for 1 week, if no issue, proceed with (b) (b) Upgrade SQL 2012, user verify for 1 week, if no issue, proceed with (c) (c) SAP Patch / upgrade, user test Option 2 Big Bang approach - SAP Upgrade / patch, Upgrade SQL server 2012 and SAP patch / upgrade SAP followed by user test. Difference between Option 1 and Option 2, Option 1 provides user test between each steps. May I know which option is recommended by SAP / SAP Best Practice? thanks and regards,

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