Question

如何创建插入和更新的触发器，它将自动将数据从一个（源）表传输到另一个（destionation）表（不同数据库中的表）？触发器需要在源表中的每次更改后传输数据。有谁知道怎么做？

Answer 1

尝试这样的事情：

USE DB1;
GO

CREATE TRIGGER dbo.table1__AIU
    ON dbo.table1
    AFTER INSERT, UPDATE
AS BEGIN
    SET NOCOUNT ON;

    DECLARE @operation char(1) = -- [I]nsert, [U]pdate, u[N]known
        CASE 
            WHEN EXISTS(SELECT * FROM inserted) THEN 
                CASE WHEN EXISTS(SELECT * FROM deleted) THEN 'U' ELSE 'I' END 
            ELSE 'N' 
        END;

    IF @operation = 'N'
        RETURN;

    IF @operation = 'I'
        INSERT INTO DB2.dbo.Table2(id, b)
            SELECT inserted.id, inserted.b
            FROM inserted;
    ELSE
        UPDATE t2 
            SET b = inserted.b
            FROM DB2.dbo.Table2 t2
            INNER JOIN inserted i ON t2.id = inserted.id;
END;
GO

如何创建插入和更新数据的触发器

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