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  • SQL获取汉字首字母

    create function f_GetPy(@str nvarchar(4000))
    returns nvarchar(4000)
    as
    begin
    declare @strlen int,@re nvarchar(4000)
    declare @t table(chr nchar(1) collate Chinese_PRC_CI_AS,letter nchar(1))
    insert into @t(chr,letter)
      select '','A' union all select '','B' union all
      select '','C' union all select '','D' union all
      select '','E' union all select '','F' union all
      select '','G' union all select '','H' union all
      select '','J' union all select '','K' union all
      select '','L' union all select '','M' union all
      select '','N' union all select '','O' union all
      select '','P' union all select '','Q' union all
      select '','R' union all select '','S' union all
      select '','T' union all select '','W' union all
      select '','X' union all select '','Y' union all
      select '','Z'
      select @strlen=len(@str),@re=''
      while @strlen>0
      begin
        select top 1 @re=letter+@re,@strlen=@strlen-1
          from @t a where chr<=substring(@str,@strlen,1)
          order by chr desc
        if @@rowcount=0
          select @re=substring(@str,@strlen,1)+@re,@strlen=@strlen-1
      end
      return(@re)
    end
    go
    
    update BY_CustomerContacter Set Initials=upper(substring(dbo.f_GetPy(ContacterName), 1, 1))
    update BY_SupplierContacter Set Initials=upper(substring(dbo.f_GetPy(ContacterName), 1, 1))
    
    drop function dbo.f_GetPy
    
    select Initials,ContacterName,Id from BY_CustomerContacter order by Initials asc
    select Initials,ContacterName,Id from BY_SupplierContacter order by Initials asc
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  • 原文地址:https://www.cnblogs.com/deep-blue/p/5110051.html
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