在插入

Question

尝试创建一个获取数据的触发器，然后将其替换为应该插入的列。

ALTER trigger beflogs 
ON dbo.tbl_logs
INSTEAD OF INSERT
AS 
    SET NOCOUNT ON
    BEGIN

        DECLARE @tc INT

        SELECT @tc = COUNT(*) 
        FROM dbo.tbl_logs;VALUES(col1,col2,col3,col4,col5)

        UPDATE dbo.tbl_logs
        SET id = @tc+1
        FROM dbo.tbl_logs
        INNER JOIN inserted i ON i.id = dbo.tbl_logs.id
    END

似乎缺少的部分，触发器成功完成，但每当我尝试插入数据时，都没有结果。

Answer 1

请参考此处的示例演示

   CREATE TABLE dbo.data (
    id INT
    ,NAME VARCHAR(10)
    ,StoreId INT
    )

CREATE TRIGGER beflogs ON dbo.data
INSTEAD OF INSERT
AS
SET NOCOUNT ON

BEGIN
    DECLARE @tc INT

    SELECT @tc = COUNT(*)
    FROM dbo.data;

    INSERT dbo.data (
        ID
        ,NAME
        ,StoreId
        )
    SELECT id = @tc + 1
        ,I.NAME
        ,I.StoreId
    FROM inserted I
END

INSERT INTO DATA (NAME,StoreId) VALUES ('A',10)
INSERT INTO DATA (NAME,StoreId) VALUES ('B',20)

SELECT *FROM DATA