oracle处理空值函数
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Oracle中如何处理空值函数(NVL、NVL2、NULLIF等)详解
目录前言一、函数语法NVL函数NVL2函数NULLIF函数COALESCE函数DECODE函数二、用法区别三、测试用例总结前言[详细]
2024-11-09 09:00 分类：数据库WINAPI SetLastError versus C++ Keword Throw
What is the difference between the WINAPI SetLastError() and the C++ keyword throw?For example, are SetLastError(5); and thr开发者_如何学编程ow 5; the same?SetLastError sets a simple global variable,[详细]
2022-12-28 20:11 分类：问答
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