If your table statistics are up to date, you can quickly and inexpensively check the cardinality of the columns in your existing table by issuing the following statement.

如果表的统计信息是最新的，那么就可以通过如下语句快速检查现有表内列的基数。

youdao

Hopefully, your date will be able to read your signals, but in the worst case scenario where they are saying they are so happy to have found you at last and you are thinking, "check please!"

但愿你的对象能够解读这些信号，但最烂俗的情节就是他们说很庆幸最终找到了你，但你却在想“您还是继续找吧！”

youdao

Strictly speaking, you don't need to perform this now, as you just installed your repository and it should not be out of date. But it doesn't hurt to check just in case.

严格来说，我们现在并不需要执行这个过程，因为我们刚刚安装了自己的仓库，它应该还没有过期。

youdao