Question

我需要编写一个循环来将SQL临时表上的数据逐个传递给存储过程。可以使用以下方法吗？是否需要大量内存？

DECLARE @SomeData AS TABLE(
    Id      INT,
    Name    VARCHAR(MAX),
    Age     INT
)

INSERT INTO @SomeData
        ( Id, Name, Age )
VALUES  ( 1, 'AAAAA', 10 ),
        ( 2, 'BBBBB', 12 ),
        ( 3, 'CCCCC', 13 ),
        ( 4, 'DDDDD', 14 ),
        ( 5, 'EEEEE', 15 );

DECLARE @iterator INT = 0

WHILE @iterator< (SELECT COUNT(Id) FROM @SomeData)
BEGIN
    SELECT * 
    FROM @SomeData
    ORDER BY Id 
    OFFSET @iterator ROWS
    FETCH NEXT 1 ROWS ONLY

    SET @iterator +=1


    /*Execute a Stored Procedure*/
END

Answer 1

我认为你之后不需要（SELECT COUNT（Id）FROM @SomeData），如果表SomeData是一个大数据，它会慢。你可以尝试这样：

DECLARE @iterator INT = 0
declare @n int = (SELECT COUNT(Id) FROM @SomeData)
WHILE @iterator< @n
BEGIN
    SELECT * 
    FROM @SomeData
    ORDER BY Id 
    OFFSET @iterator ROWS
    FETCH NEXT 1 ROWS ONLY

    SET @iterator +=1


    /*Execute a Stored Procedure*/
END

抵消＆amp; Fetch Next可以在循环中使用吗？

1 个答案: