mysql报1366错误

我在create table （表名）（

）DEFAULT CHARSET = utf8；加上utf8这一句

CREATE TABLE air_quality_index(

  id INT PRIMARY KEY AUTO_INCREMENT,

  district_id INT ,

  monitor_time DATE NOT NULL,

  pm10 INT NOT NULL,

  pm25 INT NOT NULL,

  monitoring_station VARCHAR(500) NOT NULL,

  last_modify_time DATE NOT NULL

)DEFAULT CHARSET = utf8;