syntax error : 1064 , when creating a stored procedure - mysql

Question

CREATE table parent_user
( userid int auto_increment PRIMARY KEY,
Username varchar(100) NOT NULL,
Password varchar(200) NOT NULL,
Email varchar(200) NOT NULL
);
EDIT : OK so I made some changes:
CREATE PROCEDURE `parent_reg` (
pUserName varchar(100)
pPassword varchar(200)
pEmail varchar(200)
)
as
Begin
Declare Count int
Declare ReturnCode int
Select Count = Count(Username)
from parent_user where Username = #Username
If Count > 0
Begin
Set ReturnCode = -1
End
Else
Begin
Set ReturnCode = 1
insert into parent_user values
(pUserName, pPassword, pEmail)
End
Select pReturnCode as ReturnValue
End
But I still got the same error-
Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'pPassword varchar(200) pEmail varchar(200) ) ....'
The syntax error is at 'pPassword varchar(200)'

Answer 1

The code in the question is invalid syntax for MySQL Stored Procedure. It looks more like Microsoft SQL Server (Transact SQL) syntax.
Some observations:
MySQL procedure variables cannot start with # because that character is reserved for user-defined variables.
MySQL doesn't use a NVARCHAR type. The setting of the character_set_client variable in the session (at the time the procedure is created) is what controls the characterset of the procedure variables.
The line select * from parent_user, before the CREATE PROCEDURE looks entirely out of place.
Missing semicolons (statement terminators).
The INSERT is for a table with four columns; there are only three values and no column list.
If the goal is to create a stored procedure in MySQL, we'd need syntax closer to this:
DELIMITER $$
CREATE PROCEDURE parent_reg(p_username VARCHAR(100),
p_password VARCHAR(200), p_email VARCHAR(200)
)
BEGIN
DECLARE mycount INT;
DECLARE myreturncode INT;
SELECT COUNT(pu.username)
INTO mycount
FROM `parent_user` pu
WHERE pu.username = p_username;
IF (mycount > 0 ) THEN
SET myreturncode = -1;
ELSE
SET myreturncode = 1;
INSERT INTO `parent_user` (`username`, `password`, `email`)
VALUES (p_username, p_password, p_email);
END IF;
SELECT myreturncode AS `ReturnValue`;
END$$
DELIMITER ;

Answer 2

Maybe it's your database's collation. When installing SQL Server and choose your default collation, there's a "case sensitivity" checkbox. Certain collations are case sensitive and will affect your queries (and stored procedures).
A lot of vendors don't test their products on servers with case sensitive collations, which leads to runtime errors.
So just try to choose between "Username" and "UserName"