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The Oracle Database Documentation and other resources use these sample schemas to demonstrate the capabilities of Oracle Database and the SQL and PL/SQL languages ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

已知直角非凸多边形的各顶点坐标，计算它中间以两个顶点为对角顶点的长方形面积最大的面积。比如 ...