Deleting a Client
• From the SAP login screen, login as any super user in any existing client (which you want to delete)
• Access the menu path Tools -> Administration -> Client admin.-> Special functions -> Delete client. Alternately run transaction SCC5.
• In the resulting screen select the option ‘Delete from T000’ and click on ‘Online’ pushbutton in order to run the client delete in the foreground. Alternately administrator can also run this in the background by clicking the pushbutton ‘Background’
You can set the SAP to default client login via parameter “login/system_client” means every time when you are going to login in SAP you will find 100 as client as shown in below image
This can be done using transaction code RZ10 . As an example, you can set the parameter to client 100 in transaction code RZ10. A restart is needed to make the changes activated.
simratsdh 