sql server create a stored procedure

TestDB use
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IF object_ID ( 'GetStrdent', 'P') IS NULL - if not the stored procedure exists, delete
Drop Procedure GetStrdent
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the Create Procedure GetStudent-- create a stored procedure
@SNO int, - parameters
@SName varchar ( 20) - parameters
AS
the SELECT SNO, SName from strdent
the WHERE SNO like @SNO and SName like @sname
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