SQL截取字段字符串的方法

set @str=‘WX15-53-H-53-99-15-335-23;

select @str as '字符'

select len(@str) as '字符长度'

select charindex('-',@str,1) as '第一个逗号的索引'

select LEFT(@str,charindex('-',@str,1)-1) as '第一个'

select SUBSTRING(@str,charindex('-',@str,1)+1,len(@str)) as '从第一逗号开始截取出后面的字符串'

select LEFT(SUBSTRING(@str,charindex('-',@str,1)+1,len(@str)),CHARINDEX('-',SUBSTRING(@str,charindex('-',@str,1)+1,len(@str)),1)-1) as '中间的'

select SUBSTRING(SUBSTRING(@str,charindex('-',@str,1)+1,len(@str)),charindex('-',SUBSTRING(@str,charindex('-',@str,1)+1,len(@str)),1)+1,len(@str)) as '2-后面的值

select SUBSTRING(SUBSTRING(@str,charindex('-',@str,2)+1,len(@str)),charindex('-',SUBSTRING(@str,charindex('-',@str,2)+1,len(@str)),2)+1,len(@str)) as '2-后面的值

select SUBSTRING(SUBSTRING(@str,charindex('-',@str,6)+1,len(@str)),charindex('-',SUBSTRING(@str,charindex('-',@str,6)+1,len(@str)),6)+1,len(@str)) as '5-后面的值

以此类推 取出的值为15-335-23