从插入的FirstTable获取Id

Question

我有这个例子，我需要插入（按钮点击后）一行到FirstTable，在RelationTable中插入两行。来自RelationTable的两行需要为外键FirstTableId获取刚插入行的FirstTableId值。

INSERT INTO FirstTable(atribute) VALUES ('example');
INSERT INTO Relation(RelationDetail, SecondTableId, FirstTableId) VALUES('something', some value , ???);
INSERT INTO Relation(RelationDetail, SecondTableId, FirstTableId) VALUES('something', some value , ???);

Answer 1

执行插入后只需使用SCOPE_IDENTITY()：

DECLARE @Id INT

INSERT INTO FirstTable(atribute) VALUES ('example');
SELECT @Id = SCOPE_IDENTITY()
INSERT INTO Relation(RelationDetail, SecondTableId, FirstTableId) VALUES('something', some value , ???);
INSERT INTO Relation(RelationDetail, SecondTableId, FirstTableId) VALUES('something', some value , ???);