Integrated square error (ISE) for discrete time systems

I have a continious time open loop system that I disretize after implementing a control algorithm on it. I was wondering if I can use the same ISE formula which is valid for continious systems for my discrete time system? or does ISE correspond to sum of squared error (SSE) in discrete time?

ISE: https://en.wikipedia.org/wiki/Mean_integrated_squared_error

SSE: https://hlab.stanford.edu/brian/error_sum_of_squares.html