How do I find out the current patch level in SAP R/3 4.7

ou can use either of these two methods:

1: Follow the path

System --> Status --> Component Information (The Magnifying glass button in the SAP System Data section)

2: Use the Transaction code ---- spam

spam(Support package manager) --> package level

Steps to Start Your Database After Kernel Upgrade

Do these steps to start your database:

1. Open command prompt

2. Give command: SQLPLUS "/as sysdba"
If its giving message connected to idle instance then proceed:

3. Give command: startup open
If its giving error that database is already open, shut it down first. Then first check what database process is up and running.

4. Try stopping the database: shutdown immediate.

5. Follow step 3 again after shut down the database.

6. Exit from SQLPLUS

7. Run command on command prompt: R3trans -d
Check the results whether its still giving error or if it completed with 000 return code, then try starting SAP.

Follow the above steps.