如何更改字符串中的大小写

问题描述

我的表有一列包含如下字符串:" HRM_APPLICATION_DELAY_IN"

My table has one column that contain strings like: " HRM_APPLICATION_DELAY_IN"

我想对这一列的每一行进行波纹管操作

I want to perform bellow operations on each row on this column

1. 转换为小写
2. 去除下划线_"
3. 更改下划线后字符的大小写(转换为大写)，例如:"hrm_Application_Delay_In"

需要转换帮助.感谢提前

Need help for conversion. Thanks for advance

推荐答案

这里是一个实现它的函数:

Here is a function to achieve it:

create function f_test
(
@a varchar(max)

)
returns varchar(max)
as
begin
  set @a = lower(@a)
  while @a LIKE '%\_%' ESCAPE '\'
  begin
    select @a = stuff(@a, v, 2, upper(substring(@a, v+1,1)))
    from (select charindex('_', @a) v) a
  end
  return @a
end

示例:

select dbo.f_test( HRM_APPLICATION_DELAY_IN')

结果:

hrmApplicationDelayIn

这里是一个如何用函数编写语法的例子来更新你的表:

To update your table here is an example how to write the syntax with the function:

UPDATE <yourtable>
SET <yourcolumn> = dbo.f_test(col)
WHERE <yourcolumn> LIKE '%\_%' ESCAPE '\'