These are called 'naked' field references. Usually a field reference in a chart or table will be inside an aggregation expression (Max(), Sum(), ...). These are presumably strings, so you could use MaxString() or Concat().
If the problem is nulls, then you could use
=If(IsNull(Status), ''. Status) & If(IsNull(Alert), '', Alert)
thanks jonathan.. its working now but by creating variable..
Could you please suggest now i have two fields Status and Alert in single column by using concatenation... Can i do like that suppose i want to give color coding to that column only to Alert. let Say
Output is like below
Enable - Good now i want only Good Text should be change by Green Color and Enable would remain same.