SQL语句:

create table t_employee(
    e_id int unsigned AUTO_INCREMENT,
    e_num varchar(20) NOT NULL,
    e_name varchar(10) NOT NULL,
    e_sxe ENUM('男','女') NOT NULL,
    e_age int NOT NULL,
    e_tel varchar(11) NOT NULL,
    e_icnumber varchar(20),
    PRIMARY KEY (e_id)
);

出现错误:

navicat > 1291 - Column 'e_sxe' has duplicated value '?' in ENUM

问题所在:未设置字符编码格式。

更正语句:

create table t_employee(
    e_id int unsigned AUTO_INCREMENT,
    e_num varchar(20) NOT NULL,
    e_name varchar(10) NOT NULL,
    e_sxe ENUM('男','女') NOT NULL,
    e_age int NOT NULL,
    e_tel varchar(11) NOT NULL,
    e_icnumber varchar(20),
    PRIMARY KEY (e_id)
)engine=InnoDB default charset=utf8;

成功解决:

ok !