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我是 PL/SQL 语言的新手。我看到PL/SQL:UPPER和NLS_UPPER. 他们都做同样的事情。我想知道这些功能之间的区别。谢谢
PL/SQL
UPPER
NLS_UPPER
NLS_UPPER了解区域设置特定规则
这个查询:
select nls_upper('ß', 'NLS_SORT = XGerman') as upper1, upper('ß') as upper2 from dual;
返回以下内容:
UPPER1 | UPPER2 --------+------- 不锈钢 | ß
看到不同?