我想添加一个值Altersstruktur_u18和Altersstruktur_1822。在未来,我也需要同样的,但为了分裂。public Integer Altersstruktur_1822{get; set;} // variable for people >= 18 AND <= 22
public Integer Sum_u18
但是,我一直收到以下错误:ERROR 1822 (HY000): Failed to add the foreign key constraint.(我在使用mySQL工作台。Missing index for constraint 'consTAKE3' in the referenced table 'classes'
ERROR 1822 (HY000): FailedMissing index for constraint 'consTAKE4' in the refere