How to split a string after specific character in SQL Server and update this value to specific column

Question

I have table with data 1/1 to 1/20 in one column. I want the value 1 to 20 i.e value after \'/\'(front slash) is updated into other column in same

Answer 1

SELECT SUBSTRING(ParentBGBU,0,CHARINDEX('-',ParentBGBU,0)) FROM dbo.tblHCMMaster;