php - MySQL Query Help - DATEDIFF and Writing Results to A New Column -


OK, I have an unpleasant problem to solve and I've been stumped.

I have a MySQL table essentially

  id Tronsdet Startdet ended Unit 1 Unit 1 Product Unit 2 Unit 2 Pross 1 2014-07-31 2014- with this structure 10-25 2014-10-29 22 hits 25.00 27 25.00   

I need to do is make another column which Kuldin which calculates the number of days between Startdet and ended.

How do I do this?

Thank you very much

- Create columns

 < Change the code> table YourTableName column add daysdiff int;   

- Update the new column with the appropriate calculations

  update YourTableName set daysdiff = datediff (enddate, startdate);    

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