https://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html
serial: SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.
zerofill：如果指定numeric 列指定为 zerofill ,自动为非符号列 If you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to the column.
bool Boolean 与tinyint(1)同，0 为 false ，非0为true; 但是 true=1 ,false=0
These types are synonyms for tinyint(1). A value of zero is considered false. Nonzero values are considered true
bigint 列不能超过：9223372036854775807