Php 尝试联接两个表时，Sum不正确
在使用联接时，我很难从Php 尝试联接两个表时，Sum不正确,php,mysql,sql,codeigniter,sum,Php,Mysql,Sql,Codeigniter,Sum,在使用联接时，我很难从qty列中获得正确的总和。当我试图从paymentType表中获取timestamp并将它们与orders和paymentType表中的rowid连接起来，然后将timestamp在天（天（从unixtime（paymentType.timestamp）） 我想要使用paymentType表中的时间戳按小时计算的数量之和，唯一的链接是rowid（这是codeigniter的购物车模块的rowid）。逻辑上的问题（至少对我来说）是，orders表（因为这是每种产品）中的行数比
qtypaymentTypetimestamporderspaymentTyperowidtimestamp（天（从unixtime（paymentType.timestamp））paymentType时间戳按小时计算的数量之和，唯一的链接是rowid
（这是codeigniter的购物车模块的rowid
）。逻辑上的问题（至少对我来说）是，orders
表（因为这是每种产品）中的行数比paymentType
表中的行数多（这只是为了跟踪使用的是借记还是现金）。当我将这些表合并在一起时，每小时的总和将乘以orders.rowid paymentType.rowid
中的每次点击次数
如果解释不好，我很抱歉，但我希望这是可以理解的，我可以在这件事上得到帮助
我至少试过10个问题，但似乎没有一个是我想要的
以下是我的订单
表
+---------+----+-------+-----+----------+------------------+----------------------------------+
| orderID | id | price | qty | subtotal | name | rowid |
+---------+----+-------+-----+----------+------------------+----------------------------------+
| 3 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 4 | 24 | 35 | 1 | 35 | Monster Energy | 1ff1de774005f8da13f42943881c655f |
| 5 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 6 | 19 | 20 | 1 | 20 | Sprite 0.5L | 1f0e3dad99908345f7439f8ffabdffc4 |
| 7 | 1 | 25 | 1 | 25 | Pringles | c4ca4238a0b923820dcc509a6f75849b |
| 8 | 43 | 20 | 1 | 20 | Lån av stekovn | 17e62166fc8586dfa4d1bc0e1742c08b |
| 9 | 46 | 35 | 1 | 35 | Burn | d9d4f495e875a2e075a1a4a6e1b9770f |
| 10 | 49 | 35 | 3 | 105 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 11 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 12 | 29 | 25 | 1 | 25 | Potetskruer | 6ea9ab1baa0efb9e19094440c317e21b |
| 13 | 16 | 20 | 1 | 20 | Coca-Cola 0.5L | c74d97b01eae257e44aa9d5bade97baf |
| 14 | 46 | 35 | 1 | 35 | Burn | d9d4f495e875a2e075a1a4a6e1b9770f |
| 15 | 1 | 25 | 1 | 25 | Pringles | c4ca4238a0b923820dcc509a6f75849b |
| 16 | 18 | 20 | 1 | 20 | Eventyrbrus 0.5L | 6f4922f45568161a8cdf4ad2299f6d23 |
| 17 | 16 | 20 | 1 | 20 | Coca-Cola 0.5L | c74d97b01eae257e44aa9d5bade97baf |
| 18 | 15 | 30 | 1 | 30 | Coca-Cola 1.5L | 9bf31c7ff062936a96d3c8bd1f8f2ff3 |
| 19 | 19 | 20 | 1 | 20 | Sprite 0.5L | 1f0e3dad99908345f7439f8ffabdffc4 |
| 20 | 50 | 20 | 1 | 20 | Stratos bar | c0c7c76d30bd3dcaefc96f40275bdc0a |
+---------+----+-------+-----+----------+------------------+----------------------------------+
+-----------+-------------+------------+----------------------------------+
| paymentID | paymentType | timestamp | rowid |
+-----------+-------------+------------+----------------------------------+
| 3 | Kort | 1424447799 | f457c545a9ded88f18ecee47145a72c0 |
| 4 | Kort | 1424448791 | 1ff1de774005f8da13f42943881c655f |
| 5 | Kort | 1424452822 | f457c545a9ded88f18ecee47145a72c0 |
| 6 | Kort | 1424454483 | c4ca4238a0b923820dcc509a6f75849b |
| 7 | Kort | 1424454665 | d9d4f495e875a2e075a1a4a6e1b9770f |
| 8 | Kontant | 1424454799 | f457c545a9ded88f18ecee47145a72c0 |
| 9 | Kontant | 1424454825 | f457c545a9ded88f18ecee47145a72c0 |
| 10 | Kort | 1424454870 | 6ea9ab1baa0efb9e19094440c317e21b |
| 11 | Kontant | 1424455510 | d9d4f495e875a2e075a1a4a6e1b9770f |
| 12 | Kort | 1424455847 | c4ca4238a0b923820dcc509a6f75849b |
| 13 | Kontant | 1424456025 | 6f4922f45568161a8cdf4ad2299f6d23 |
| 14 | Kontant | 1424456099 | c74d97b01eae257e44aa9d5bade97baf |
| 15 | Kontant | 1424456148 | 9bf31c7ff062936a96d3c8bd1f8f2ff3 |
| 16 | Kontant | 1424456242 | c0c7c76d30bd3dcaefc96f40275bdc0a |
| 17 | Kort | 1424456266 | c74d97b01eae257e44aa9d5bade97baf |
| 18 | Kort | 1424456445 | c0c7c76d30bd3dcaefc96f40275bdc0a |
| 19 | Kort | 1424456964 | 70efdf2ec9b086079795c442636b55fb |
| 20 | Kort | 1424457701 | 1ff1de774005f8da13f42943881c655f |
+-----------+-------------+------------+----------------------------------+
这是paymentType
表
+---------+----+-------+-----+----------+------------------+----------------------------------+
| orderID | id | price | qty | subtotal | name | rowid |
+---------+----+-------+-----+----------+------------------+----------------------------------+
| 3 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 4 | 24 | 35 | 1 | 35 | Monster Energy | 1ff1de774005f8da13f42943881c655f |
| 5 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 6 | 19 | 20 | 1 | 20 | Sprite 0.5L | 1f0e3dad99908345f7439f8ffabdffc4 |
| 7 | 1 | 25 | 1 | 25 | Pringles | c4ca4238a0b923820dcc509a6f75849b |
| 8 | 43 | 20 | 1 | 20 | Lån av stekovn | 17e62166fc8586dfa4d1bc0e1742c08b |
| 9 | 46 | 35 | 1 | 35 | Burn | d9d4f495e875a2e075a1a4a6e1b9770f |
| 10 | 49 | 35 | 3 | 105 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 11 | 49 | 35 | 1 | 35 | Red Bull Stor | f457c545a9ded88f18ecee47145a72c0 |
| 12 | 29 | 25 | 1 | 25 | Potetskruer | 6ea9ab1baa0efb9e19094440c317e21b |
| 13 | 16 | 20 | 1 | 20 | Coca-Cola 0.5L | c74d97b01eae257e44aa9d5bade97baf |
| 14 | 46 | 35 | 1 | 35 | Burn | d9d4f495e875a2e075a1a4a6e1b9770f |
| 15 | 1 | 25 | 1 | 25 | Pringles | c4ca4238a0b923820dcc509a6f75849b |
| 16 | 18 | 20 | 1 | 20 | Eventyrbrus 0.5L | 6f4922f45568161a8cdf4ad2299f6d23 |
| 17 | 16 | 20 | 1 | 20 | Coca-Cola 0.5L | c74d97b01eae257e44aa9d5bade97baf |
| 18 | 15 | 30 | 1 | 30 | Coca-Cola 1.5L | 9bf31c7ff062936a96d3c8bd1f8f2ff3 |
| 19 | 19 | 20 | 1 | 20 | Sprite 0.5L | 1f0e3dad99908345f7439f8ffabdffc4 |
| 20 | 50 | 20 | 1 | 20 | Stratos bar | c0c7c76d30bd3dcaefc96f40275bdc0a |
+---------+----+-------+-----+----------+------------------+----------------------------------+
+-----------+-------------+------------+----------------------------------+
| paymentID | paymentType | timestamp | rowid |
+-----------+-------------+------------+----------------------------------+
| 3 | Kort | 1424447799 | f457c545a9ded88f18ecee47145a72c0 |
| 4 | Kort | 1424448791 | 1ff1de774005f8da13f42943881c655f |
| 5 | Kort | 1424452822 | f457c545a9ded88f18ecee47145a72c0 |
| 6 | Kort | 1424454483 | c4ca4238a0b923820dcc509a6f75849b |
| 7 | Kort | 1424454665 | d9d4f495e875a2e075a1a4a6e1b9770f |
| 8 | Kontant | 1424454799 | f457c545a9ded88f18ecee47145a72c0 |
| 9 | Kontant | 1424454825 | f457c545a9ded88f18ecee47145a72c0 |
| 10 | Kort | 1424454870 | 6ea9ab1baa0efb9e19094440c317e21b |
| 11 | Kontant | 1424455510 | d9d4f495e875a2e075a1a4a6e1b9770f |
| 12 | Kort | 1424455847 | c4ca4238a0b923820dcc509a6f75849b |
| 13 | Kontant | 1424456025 | 6f4922f45568161a8cdf4ad2299f6d23 |
| 14 | Kontant | 1424456099 | c74d97b01eae257e44aa9d5bade97baf |
| 15 | Kontant | 1424456148 | 9bf31c7ff062936a96d3c8bd1f8f2ff3 |
| 16 | Kontant | 1424456242 | c0c7c76d30bd3dcaefc96f40275bdc0a |
| 17 | Kort | 1424456266 | c74d97b01eae257e44aa9d5bade97baf |
| 18 | Kort | 1424456445 | c0c7c76d30bd3dcaefc96f40275bdc0a |
| 19 | Kort | 1424456964 | 70efdf2ec9b086079795c442636b55fb |
| 20 | Kort | 1424457701 | 1ff1de774005f8da13f42943881c655f |
+-----------+-------------+------------+----------------------------------+
编辑：
到目前为止，我尝试过的SQL查询还有很多，但这些都是最新的。我认为这些是最“正确”的
预期结果是将“红牛存储”（即）的数量列按小时分组，对每天进行汇总。您可以尝试以下方法：
select o.name
, pt.rowid
, sum(o.qty)
, hour(from_unixtime(pt.timestamp))
, day(from_unixtime(pt.timestamp))
from orders o
join paymentType pt using(rowid)
where o.name = 'Red Bull Stor'
group by o.name
, o.rowid
, hour(from_unixtime(pt.timestamp))
, day(from_unixtime(pt.timestamp));
若您提供了两个最接近您答案的问题，这将是一个很好的问题。@Cᴏ好吧，那就足够了。一个好问题将提供适当的DDL和期望的结果集。@草莓：很公平。至少对某人的第二篇帖子来说是正确的：）@Cory我已经用我迄今为止尝试过的最新MySQL查询更新了原始问题。如果需要为预期结果集模拟som示例，我将根据迄今为止得到的查询进行尝试。@StrawberryThank you@notulysses！-不幸的是，我拥有的数据集并不完整，正如我所发现的那样，我尝试过的大量查询实际上都能按预期工作（给了我正确的结果），但由于我的表中的数据远未完成，我无法产生我想要的结果。（顺便说一句，codeigniter中的rowid是产品的标识符，而不是购物车或订单……这是我在生成正确数据集时遇到困难的主要原因）再次感谢所有帮助，您的查询完全符合我的要求：-）@FredrikAngellMoe:很高兴帮助您