sql - removing the domain name from the username parameter -


i have created storedprocedure contains @username parameter varchar field. contain values domain\username. in case domain int. how remove domain part parameter

oracle:

select substr(username, instr(username, '\',-1,1)) newusername dual

mysql: 

select right(@username, length(@username) - instr(@username, '\')) newusername

sql server:

select right(@username, len(@username) - charindex('\', @username)) newusername

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