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Questions And Answers for PowerBuilder Interviews

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Question: #53 of #131

Section: DataWindow

Version: 5.0 or later

Question

What is the difference between a 'Computed Column' and 'Computed Field'?

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'Computed Column' is a column that you define as part of the SELECT statement. These values are calculated by the database and sent to the PowerBuilder client. 'Computed Field's' we define in the DataWindow bands and PowerBuilder calculates these values, not the database. Depending on your computing model 'Fat Client' or 'Thin Client' you can decide which one to use. If it is 'Fat Client' model, use 'Computed Fields', otherwise use 'Computed Columns'.

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