How do I make a column in a database table based on the values of other columns? For example: I want to make a column named "full_name" and I want the row values for it to be from "first_name" and "last_name". For the first row: first_name= Bob and last_name=Jones. How do I make it so that full_name gets Bob Jones as its value? (I prefer it done in one command if possible).How do I make a column in a database table base
阅读背景：
如何使用其他几列的值创建SQL中的列？
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