How to use a calculated column to calculate another column in the same view

Question

I am hoping you can help with this question. I am using Oracle SQL (SQL Developer for this view)...

If I have a table with the following columns:

• Co

Answer 1

In Sql Server

You can do this using cross apply

Select
  ColumnA,
  ColumnB,
  c.calccolumn1 As calccolumn1,
  c.calccolumn1 / ColumnC As calccolumn2
from t42
cross apply (select (ColumnA + ColumnB) as calccolumn1) as c