declare @T table(A varchar(20),B varchar(20),C varchar(20))
insert into @t(A) select '813zx-01-5/9'
union all select '813zx-01-5/12'
union all select '813zx-01-51/12'
union all select '813zx-01-53331/31312'
update @t set b=left(right(A,charindex('-',reverse(A))-1),charindex('/',right(A,charindex('-',reverse(A))-1))-1),
c=Substring(right(A,charindex('-',reverse(A))-1),charindex('/',right(A,charindex('-',reverse(A))-1))+1,len(right(A,charindex('-',reverse(A))-1)))