Case Statement error on Task Completion Date

Summary:

Hello, I need help to check if this case statement is correct. My case is if the "Step Completion Status" is 'Completed', it returns the "Step Completion Date"; otherwise, it returns an empty string. Thank you in advance!

CASE WHEN "Workforce Performance - Performance Task Status Real Time"."- Performance Task Status Details"."Performance Task Status" = 'Completed' THEN "Workforce Performance - Performance Task Status Real Time"."- Performance Task Status Details"."Step Completion Date" ELSE '' END

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