Delimiter in MySQL

DELIMITER: Represents a delimiter that prevents SQL from treating stored procedures as SQL, because SQL is a semicolon-executed
(Stored procedure This, we have agreed, use//delimiter, and then revert to; delimiter, so Convention)
Definer: The parameter represents the user who defines the stored procedure, only the super-privileged user can designate Definer as an account other than himself (representing who defined the stored procedure)

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(SQL SECURITY Definer: A program that executes stored procedures is executed by the permissions of the user who created the stored procedure.)
SQL SECURITY INVOKER: Indicates that the program executing the stored procedure is executed by the permission of the user who called the stored procedure.
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Delimiter in MySQL