UISTIC‘;官方文档中关于NLS_SORT和NLS_COMP有这样一段话: NLS_SORT specifies the collating sequence for ORDER BY queries.If the value is BINARY, then the collating sequence for ORDER BY queries is based on the numeric value of characters (a binary sort that requires less system overhead).If the value is a named linguistic sort, sorting is based on the order of the defined linguistic sort. Most (but ...
Oralce对NULL值的排序后的位置有一个特殊的ldquo;关照rdquo;，这就是ldquo;NULLS FIRSTrdquo;和ldquo;NULLS LASTrdquo;选项 Oralce对NULL值的排序后的位置有一个特殊的“关照”，这就是“NULLS FIRST”和“NULLS LAST”选项，使用这个选项便可以在SQL排序中强制指定NULL值出现的位置（是显示在最前，还是显示在最后）。演示并总结在此，供参考。 1.创建演示表T并初始化7条数据sec@ora10g> create table t (x int);sec@ora10g> inse...