Specifically, I'd like to insert a third column (c3) that equals c1 divided by c2 rounded to the nearest integer. I've looked at mySql cookbooks and skimmed through O' Reilly's introduction, but I've yet to see anything that would suggest this is possible.Specifically, I'd like to insert a third column
阅读背景：
在mySql中是否可以插入一个列，该列是另外两列的数学函数？
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