Oracle database prior to 8.1.6 only had DECODE function. CASE was introduced in Oracle 8.1.6 as a standard, more meaningful and more powerful function. Everything DECODE can do, CASE can. There is a ...
在本文中，我们将讨论一些强大的 SQL 通用函数，它们是——NVL 函数、NVL2 函数、DECODE 函数、聚结函数、NULLIF 函数、LNNVL ...
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