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I'm guessing from your prior questions that you're a professional, so here's an typical example if a table already has numeric columns named TotalSales and TotalCosts:<br />
<br />
ALTER TABLE TableA ADD GrossProfit as TotalSales - TotalCosts<br />
<br />
[If I'm wrong, and you are asking for homework, then my answer is: I used to have a Chevy Attribute that I would derive to work, and it worked by pushing the gas peddle. &nbsp;:) ]<br />

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I'm guessing from your prior questions that you're a professional, so here's an typical example if a table already has numeric columns named TotalSales and TotalCosts:

ALTER TABLE TableA ADD GrossProfit as TotalSales - TotalCosts

[If I'm wrong, and you are asking for homework, then my answer is: I used to have a Chevy Attribute that I would derive to work, and it worked by pushing the gas peddle.  :) ]


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Gee, guys, I hope I didn't offend anyone with my question. &nbsp;I was just trying to be specific about what I was looking for.<br />
<br />
Anyway, would the ALTER SQL command be included in script that creates the schema?
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Gee, guys, I hope I didn't offend anyone with my question.  I was just trying to be specific about what I was looking for.

Anyway, would the ALTER SQL command be included in script that creates the schema?

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Sorry, didn't notice the follow up question until now.<br />
<br />
You can add an ALTER TABLE command to a longer script, or, if you're creating the table, you can define the derived column in the CREATE TABLE command:<br />
<br />
CREATE TABLE TableA(Col1 int, Col2 int, Col3 as Col1 + Col2)<br />
<br />
[I don't think anyone was offended. And I was happy to get to use my &quot;derive to work&quot; joke. :) ]<br />

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Sorry, didn't notice the follow up question until now.

You can add an ALTER TABLE command to a longer script, or, if you're creating the table, you can define the derived column in the CREATE TABLE command:

CREATE TABLE TableA(Col1 int, Col2 int, Col3 as Col1 + Col2)

[I don't think anyone was offended. And I was happy to get to use my "derive to work" joke. :) ]


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How do derived attributes work? &nbsp;I would like to see a typical SQL example, if possible.
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How do derived attributes work?  I would like to see a typical SQL example, if possible.

Derived Attributes

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