【文件属性】：
文件名称：SQL 获取字符串中大写字母或小写字母
文件大小：1KB
文件格式：SQL
更新时间：2022-05-24 09:25:12
SQL
if exists(select * from sys.objects where name='GetUpper')
drop function dbo.GetUpper
go
CREATE function GetUpper(@words varchar(16))
returns varchar(8000)
as
begin
DECLARE @s VARCHAR(MAX)= @words --待截取字符串
DECLARE @temp VARCHAR(MAX)='' --临时变量
SELECT @temp=@temp+SUBSTRING(ch, sv.number, 1)
FROM (SELECT @s AS ch) t
CROSS APPLY [master].dbo.spt_values AS sv
WHERE sv.type = 'P'
AND sv.number BETWEEN 1 AND LEN(ch)
AND ASCII(SUBSTRING(ch, sv.number, 1)) BETWEEN ASCII('A') AND ASCII('Z')
return @temp
end
go