Answer / bhavin parikh

SERIAL is an alias for BIGINT UNSIGNED NOT NULL
AUTO_INCREMENT UNIQUE.
Reference Link :
http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

Answer / simon mahony

Check for yourself in the official docs at:
http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

This states:
SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.

SERIAL DEFAULT VALUE in the definition of an integer column is an alias for NOT NULL AUTO_INCREMENT UNIQUE.

Answer / amith

BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT .

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