4

我搜索了很多，但找不到有用的答案：

我想通过给我一个开始和结束日期来获得用户定义的一段时间内的总计列表。总数应每次从开始日期到开始日期开始，并每行添加 1 天。所以最后一行给出了从开始到结束日期的总数。示例： - 给定期间 = 开始 2013-01-01 ，结束 = 2013-01-31

total day 1 = 100
total day 2 = 0 (not listed in my totalsperday query, but should have a row in my final query)
total day 3 = 140
total day 4 = 20
...

final table should look like:
end day 1: 100
end day 2: 100
end day 3: 240
end day 4: 260
...

所以我有一个计算所有天数的查询：

SELECT '2013-01-01' as startdate, w.endDate
FROM
(
    SELECT date('2013-01-01' + INTERVAL u.i*100 + v.i*10 + w.i DAY) AS endDate
    FROM sysints AS u
    JOIN sysints AS v
    JOIN sysints AS w
    WHERE ( u.i*100 + v.i*10 + w.i ) <= 
    (
        SELECT DATEDIFF( '2013-01-31','2013-01-01') as ddff
    )
) w
ORDER BY w.endDate ASC

我有一个查询谁计算每天的总数

SELECT p.selldate, SUM(p.price) as totalPerDay
FROM products p
WHERE   '2013-01-01' >= p.selldate <= '2013-01-31'
GROUP BY p.selldate
ORDER BY p.selldate ASC

现在将这两者结合起来得到我的最终结果很难。

基本上最终的查询应该是这样的：

- make the sum of sumperday from day 1 to day 1
- make the sum of sumperday from day 1 to day 2
- make the sum of sumperday from day 1 to day 3 
...

有什么帮助吗？谢谢。这是我最终查询的简化示例。

4

1 回答 1

0

下面是示例。这个想法是获得一个按日期排序的初始数据集，并具有汇总总计、隐式日期范围记录。然后使用游标，您可以通过每一行来获得最终的总列（示例中的 amountCalc 列），只需汇总以前的记录 - 因为您已经拥有按日期排序的列，所以可以工作。

该过程可以有其他输入/输出参数。您可以从一个视图中获取数据，而不是从表中获取信息，其中视图可以按日期升序排列。只是一个示例，因此可以根据需要进行定制。

祝你好运。

-- drop table `Balance`;
CREATE TABLE `Balance` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `date` DATE NOT NULL,
  `account` varchar(30) NOT NULL,
  `amount` DECIMAL(10,2) NOT NULL, 
  PRIMARY KEY (`id`)
);

INSERT INTO `Balance` (`date`, `account`, `amount`) VALUES 
('2013-01-02', 'T355176', 8700), 
('2013-01-03', 'T355176', 8900), 
('2013-01-04', 'T355215', 33308), 
('2013-01-03', 'T355215', 116581), 
('2013-01-06', 'T812022', 275000), 
('2013-01-02', 'T812063', 136500), 
('2013-01-05', 'T812063', 11682), 
('2013-01-06', 'T812064', 615100), 
('2013-01-03', 'T812064', 25000), 
('2013-01-02', 'T812085', 82500);


SELECT * FROM Balance WHERE date >= '2013-01-01' AND date <= '2013-01-06' ORDER BY date ASC;
CALL sp_getTotals('2013-01-01', '2013-01-06');


-- --------------------------------------------------------------------------------
-- Routine DDL
-- Note: comments before and after the routine body will not be stored by the server
-- --------------------------------------------------------------------------------
DELIMITER $$

CREATE DEFINER=`root`@`%` PROCEDURE `sp_getTotals`(IN startDate DATE, IN endDate DATE)
BEGIN


DECLARE dt DATE;
DECLARE amt DECIMAL(10,2);
DECLARE amtCalcPart DECIMAL(10,2);
DECLARE done INT DEFAULT 0;

DECLARE dtStart DATE;
DECLARE dtEnd DATE;

DECLARE cur1 CURSOR FOR SELECT date, amount FROM `TempMB`;
DECLARE cur2 CURSOR FOR SELECT startDate, endDate;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;


DROP TEMPORARY TABLE IF EXISTS `TempMB`;
CREATE TEMPORARY TABLE IF NOT EXISTS `TempMB` (
`id` int(11) NOT NULL AUTO_INCREMENT,
  `date` DATE NOT NULL,
  `amount` DECIMAL(10,2) NULL DEFAULT 0.00,
  `amountCalc` DECIMAL(10,2) NULL DEFAULT 0.00,
  PRIMARY KEY (`id`)
);


SET dtStart = DATE(startDate);
SET dtEnd = DATE(endDate);

WHILE dtStart <= dtEnd DO
    INSERT INTO `TempMB` (`date`) SELECT dtStart;
    SET dtStart = DATE_ADD(dtStart, INTERVAL 1 DAY);
END WHILE;


SELECT * FROM TempMB;

-- Fill temp table with info needed
UPDATE `TempMB` t 
INNER JOIN 
(
    SELECT date, SUM(amount) AS amount
    FROM Balance 
    WHERE 
        date >= startDate AND date <= endDate 
    GROUP BY date
    ORDER BY date ASC
) b ON b.date = t.date 
SET 
    t.amount = b.amount;
/*INSERT INTO `TempMB` (`date`, `amount`)
SELECT date, SUM(amount) AS amount
FROM Balance 
WHERE 
    date >= startDate AND date <= endDate 
GROUP BY date
ORDER BY date ASC;
*/


SET amtCalcPart = 0.00;
-- Initialise cursor
OPEN cur1;
-- USE BEGIN-END handler for cursor-control within own BEGIN-END block
BEGIN
DECLARE EXIT HANDLER FOR NOT FOUND BEGIN END;
-- Loop cursor throu temp records
LOOP 
    -- Get next value
    FETCH cur1 INTO dt, amt;

    -- Calculate amountCalc
    SET amtCalcPart = (SELECT SUM(amount) as amt FROM `TempMB` WHERE Date <= dt);
    UPDATE `TempMB` SET amountCalc = amtCalcPart WHERE date = dt;

END LOOP;
END;

-- Release cursor
CLOSE cur1;

SELECT * FROM TempMB;

END
于 2013-02-04T17:53:41.413 回答