replace into 遇到主键或唯一索引冲突时,会先删除数据,再插入新数据 insert into 遇到主键或唯一索引冲突时,会直接报错,不插入数据
I\'m trying to label an animated pie chart, and I\'ve been having a great deal of trouble getting rotated objects to line up with trigonometrically-positioned objects. So, for example, if I have a pie