Question

我希望以下查询的值从1到899列出。但它只返回1到667之间的值。有人可以帮我找到原因

select rownum from all_tables where rownum <900

Answer 1

你的桌子少于899个。

Answer 2

由于源表/视图中缺少行而不会出现短路的最简单的行生成器是：

select rownum from dual connect by level < 900;

Answer 3

尝试：

select level as rnum
from dual
connect by level < 900;

Answer 4

select rownum from all_objects where rownum <900