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CREATE TABLE emp3(
   id int(3) auto_increment,
   first_name varchar(30) NOT NULL,
   last_name varchar(30), 
   email varchar(20) not null unique,
   PRIMARY KEY (id)
);

ALTER TABLE emp3 ADD CONSTRAINT check_name_not_blank CHECK ((first_name<>'')), ADD CONSTRAINT check_email_not_blank CHECK ((email<>''))

check constraint is not working in mysql.so how can i use this condition in a stored procedure so as to avoid empty strings?

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