Question

我有代码，根据值TestStatusId

，这三个更新中只有一个会运行

    UPDATE  UserTest
    SET     StartedDate = @Date,
            TestStatusId = 2
    WHERE   UserTestId = @UserTestId
    AND     UserId = @UserId
    AND     TestStatusId = 1

    UPDATE  UserTest
    SET     StartedDate = @Date,
            TestStatusId = 2
    WHERE   UserTestId = @UserTestId
    AND     UserId = @UserId
    AND     TestStatusId = 3

    UPDATE  UserTest
    SET     StartedDate = @Date,
            TestStatusId = 10
    WHERE   UserTestId = @UserTestId
    AND     UserId = @UserId
    AND     TestStatusId = 4

如果有办法可以将这些更新合并到一次更新中，有没有人有任何建议？

Answer 1

是的，有：

UPDATE  UserTest
SET     StartedDate = @Date,
        TestStatusId = CASE WHEN TestStatusId IN (1,3) THEN 2 ELSE 10 END
WHERE   UserTestId = @UserTestId
AND     UserId = @UserId
AND     TestStatusId IN (1,3,4);

有没有办法让我根据更新中另一个的值设置行的值？

1 个答案: