// using SUBSTRING
declare @name varchar(50)='krishna-chaturvedi'
SELECT top 2 SUBSTRING(@name, CHARINDEX('-', @name)+1, 8000)+'/' +SUBSTRING(@name, CHARINDEX('-', @name) + 1, 8000)
FROM mstuser
// using PARSENAME
declare @name varchar(100)= 'krishna-kumar-chaturvedi'
Select PARSENAME (Replace(@name,'-','.'),1)[LastName],
PARSENAME (Replace(@name,'-','.'),2) [MiddleName],
PARSENAME (Replace(@name,'-','.'),3)[FristName]