declare @str nvarchar(50);set @str='462,464,2';select @str as '字符串'select len(@str) as '字符长度' select charindex(',',@str,1) as '第一个逗号的索引值' select LEFT(@str,charindex(',',@str,1)-1) as '第一个值' select SUBSTRING(@str,charindex(',',@str,1)+1,len(@str)) as…