關(guān)于create table命令上的重復(fù)鍵，我收到1022錯誤?？赐瓴樵兒?，我不知道在哪里進(jìn)行復(fù)制。有人可以看到嗎？SQL query:-- ------------------------------------------------------- Table `apptwo`.`usercircle`-- -----------------------------------------------------CREATE TABLE IF NOT EXISTS  `apptwo`.`usercircle` ( `idUserCircle` MEDIUMINT NOT NULL , `userId` MEDIUMINT NULL , `circleId` MEDIUMINT NULL , `authUser` BINARY NULL , `authOwner` BINARY NULL , `startDate` DATETIME NULL , `endDate` DATETIME NULL ,PRIMARY KEY (  `idUserCircle` ) ,INDEX  `iduser_idx` (  `userId` ASC ) ,INDEX  `idcategory_idx` (  `circleId` ASC ) ,CONSTRAINT  `iduser` FOREIGN KEY (  `userId` ) REFERENCES  `apptwo`.`user` (`idUser`) ON DELETE NO ACTION ON UPDATE NO ACTION ,CONSTRAINT  `idcategory` FOREIGN KEY (  `circleId` ) REFERENCES  `apptwo`.`circle` (`idCircle`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = INNODB;MySQL said: Documentation#1022 - Can't write; duplicate key in table 'usercircle'