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Oracle中的uno和dual有什么区别？

[英]what is difference between uno and dual in Oracle?

原文 2018-10-12 14:53:22 6 0 oracle

Select *from dual;
Select *from uno;

这两个查询在Oracle中都可以正常工作。 它们之间有什么区别？

0 个解决方案

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