UPPER

将字符串转换为大写字母。

语法

UPPER(STRING)

参数

STRING

类型：string

一个字符序列。

返回

类型：string

STRING 为大写字母。

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示例

SELECT UPPER("a") = "A" AND UPPER("abc") = "ABC" AND UPPER("123") = "123" AND UPPER("abc") = "ABC" AND UPPER('-=@#$') = "-=@#$" AND UPPER(null) is null AND UPPER(CAST(null as varchar)) is null