我寫的語句是ALTER TABLE `vshare`.`member` DROP PRIMARY KEY,ADD PRIMARY KEY (`id`),ADD CONSTRAINT `FK_member_cotegory` FOREIGN KEY `FK_member_cotegory` ()REFERENCES `cotegory` ()ON DELETE RESTRICTON UPDATE RESTRICT;錯誤提示是：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')REFERENCES `cotegory` ()ON DELETE RESTRICTON UPDATE RESTRICT' at line 3
1 回答
寶慕林4294392
TA貢獻2021條經驗 獲得超8個贊
主鍵字段 和 外鍵字段沒有啊
FK_member_cotegory` ()括號中是member外鍵字段，你這里是空的
REFERENCES `cotegory` ()括號中是引用的主鍵表cotegory的主鍵字段，你這里是空的
可達是要報錯的啊 ,建議修改成 如下形式
ALTER TABLE `vshare`.`member` DROP PRIMARY KEY,
ADD PRIMARY KEY (`id`),
ADD CONSTRAINT `FK_member_cotegory` FOREIGN KEY `FK_member_cotegory` (`cotegoryID`)
REFERENCES `cotegory` (`ID`)
ON DELETE RESTRICT
ON UPDATE RESTRICT;
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