I need to find How many SR's were closed and turned into CRs?

I need to find How many SR's were closed and turned into CRs?

Our project has service desk plus with all data and MSSQL as backend, I'm not getting how do i find, how many SR's were closed and turned into CR's?

I'm not able to find because I'm not able to find any relationship between these twos?

Please if anyone has already worked on such a problem please let me know?




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