There is no actual new functionality here, but formerly you had to say ALTER TABLE to do these things, which was confusing.
这样也没带来什么新功能，不过以前都是用ALTERTABLE来做这件事，很让人迷惑。
"My Lord," said a dark woman halfway down the table, her voice constricted with emotion, "it is an honor to have you here, in our family's house." There can be no higher pleasure.
“主人，”桌子中间的一个皮肤黝黑女人激动地说，“您能在这儿，在我们家族的房子里，是一种莫大的荣耀，再也没有比这更令人高兴的事情了。”
"My Lord," said a dark woman halfway down the table, her voice constricted with emotion, "it is an honor to have you here, in our family's house." There can be no higher pleasure.
“主人，”桌子中间的一个皮肤黝黑女人激动地说，“您能在这儿，在我们家族的房子里，是一种莫大的荣耀，再也没有比这更令人高兴的事情了。”
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