存储过程来查找表中所有应用程序之间的时间差

CREATE PROCEDURE FindTimeDifference
AS
BEGIN
    DECLARE @StartTime DATETIME
    DECLARE @EndTime DATETIME
    DECLARE @TimeDifference INT

    -- 创建临时表来存储结果
    CREATE TABLE #TimeDifferences
    (
        Application1 VARCHAR(50),
        Application2 VARCHAR(50),
        TimeDifference INT
    )

    -- 获取所有应用程序的列表
    INSERT INTO #TimeDifferences (Application1)
    SELECT DISTINCT Application FROM YourTable

    -- 使用游标遍历应用程序列表
    DECLARE cur CURSOR FOR
    SELECT Application1 FROM #TimeDifferences

    OPEN cur
    FETCH NEXT FROM cur INTO @StartTime

    WHILE @@FETCH_STATUS = 0
    BEGIN
        -- 查找每个应用程序与其他应用程序的时间差
        DECLARE cur2 CURSOR FOR
        SELECT DISTINCT Application FROM YourTable WHERE Application <> @StartTime

        OPEN cur2
        FETCH NEXT FROM cur2 INTO @EndTime

        WHILE @@FETCH_STATUS = 0
        BEGIN
            -- 计算时间差
            SET @TimeDifference = DATEDIFF(MINUTE, (SELECT MAX(Time) FROM YourTable WHERE Application = @StartTime), (SELECT MAX(Time) FROM YourTable WHERE Application = @EndTime))

            -- 插入结果到临时表
            INSERT INTO #TimeDifferences (Application1, Application2, TimeDifference)
            VALUES (@StartTime, @EndTime, @TimeDifference)

            FETCH NEXT FROM cur2 INTO @EndTime
        END

        CLOSE cur2
        DEALLOCATE cur2

        FETCH NEXT FROM cur INTO @StartTime
    END

    CLOSE cur
    DEALLOCATE cur

    -- 返回结果
    SELECT * FROM #TimeDifferences

    -- 删除临时表
    DROP TABLE #TimeDifferences
END