我有下面的示例數據的數據:數據檢查
ID CID Name ImageLocation Order
1 1 Suit Jacket Content/Berwin/Content/Images/SuitJacket.jpg 1
2 1 Trousers Content/Berwin/Content/Images/Trousers.jpg 2
4 2 Jumper Content/Berwin/Content/Images/Jumper.jpg 1
5 3 Trousers Content/Berwin/Content/Images/Trousers.jpg 1
6 4 Suit Jacket Content/Berwin/Content/Images/SuitJacket.jpg 1
ID是PK,CID是FK和順序是在不被示出的訂單FK
順序無論如何要強制Order
列中的數字在其CID
範圍內是唯一的。即當CID is 1
時,我將無法插入1 or 2
?
添加唯一約束謝謝:)柯特好 – ediblecode 2012-03-12 11:19:26