这是我的sql：
SELECT *
FROM products
LEFT JOIN bids
ON bids.bids_item = products.id
LEFT JOIN orders
ON orders.orders_product = products.id
WHERE products.username = ?
AND Now() > products.enddate
AND enabled = 1
OR bids > 0
GROUP BY products.id
ORDER BY bids.bids_amount DESC
我正在尝试从产品表，订单表和出价表中选择产品，假装您是使用我的网站的用户，您想要购买2个产品，第1项和第2项。您从第1项开始，即拍卖，您对该项目出价，以下信息将进入出价表：
bids_amount,
bids_id,
bids_item,
bids_timestamp
在产品表格中，我在您出价时有一个ID，一个结束日期和一个出价行，它会向出价行添加+1，并将产品ID插入到bid_item。要衡量项目何时结束，我将比较数据与结束日期。然后我使用上面的sql检查具有这些细节的已售商品。无论如何，现在你知道出价是如何运作的，现在让我们假装你买了现在购买的物品。你看到你喜欢的产品2，并决定将它添加到你的购物车，然后决定结账（这将以下信息添加到订单减去几个）
orders_id,
orders_item,
orders_username,
orders_status
所以我在技术上需要有一个SQL查询来检查出价是否＆gt; 0或者如果订单和出价表中有一行。我的桌子结构：
出价
CREATE TABLE `bids` (
`bids_id` int(11) NOT NULL AUTO_INCREMENT,
`bids_item` int(11) NOT NULL,
`bids_username` varchar(100) NOT NULL,
`bids_amount` decimal(11,8) NOT NULL,
`bids_date` datetime NOT NULL,
`bids_timestamp` int(25) NOT NULL,
PRIMARY KEY (`bids_id`),
UNIQUE KEY `bids_id` (`bids_id`)
) ENGINE=InnoDB AUTO_INCREMENT=139 DEFAULT CHARSET=latin1
订单
CREATE TABLE `orders` (
`orders_id` int(11) NOT NULL AUTO_INCREMENT,
`orders_product` int(11) NOT NULL,
`orders_username` varchar(100) NOT NULL,
`orders_status` int(11) NOT NULL,
`orders_firstname` varchar(100) NOT NULL,
`orders_lastname` varchar(100) NOT NULL,
`orders_address1` varchar(100) NOT NULL,
`orders_address2` varchar(100) NOT NULL,
`orders_zipcode` varchar(100) NOT NULL,
`orders_city` varchar(100) NOT NULL,
`orders_country` varchar(100) NOT NULL,
`orders_shipped` int(11) NOT NULL,
`orders_btcaddress` varchar(100) NOT NULL,
PRIMARY KEY (`orders_id`)
) ENGINE=InnoDB AUTO_INCREMENT=20 DEFAULT CHARSET=latin1
产品
CREATE TABLE `products` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`title` varchar(100) NOT NULL,
`description` text NOT NULL,
`shortdescription` varchar(100) NOT NULL,
`price` decimal(11,6) NOT NULL,
`username` varchar(50) NOT NULL,
`buyitnow` int(11) NOT NULL,
`enddate` datetime NOT NULL,
`purchases` int(11) NOT NULL,
`bids` int(11) NOT NULL,
`startingprice` decimal(11,6) NOT NULL,
`date` datetime NOT NULL,
`itemcondition` varchar(100) NOT NULL,
`international` int(11) NOT NULL,
`shipsto` varchar(100) NOT NULL,
`shipping` varchar(100) NOT NULL,
`shippingcost` decimal(11,6) NOT NULL,
`shippingtime` int(11) NOT NULL,
`location` varchar(100) NOT NULL,
`enabled` int(11) NOT NULL DEFAULT '1',
`category` varchar(50) NOT NULL,
`quantity` int(11) NOT NULL,
`offers` int(11) NOT NULL,
`returns` int(11) NOT NULL,
`images` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=93 DEFAULT CHARSET=latin1
我的sql显示的内容：
(84, 'balance', '', 'dfghgfds', '0.000000', 'admin', 0, '2015-03-19 17:40:24', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
(85, 'dfghdsdgb\r\n', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-19 17:41:06', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
我需要它展示：
没有，因为出价行= 0并且出价中没有行或订单与该产品匹配.id
这是我的产品行等：
CREATE TABLE IF NOT EXISTS `products` (
`id` int(11) NOT NULL,
`title` varchar(100) NOT NULL,
`description` text NOT NULL,
`shortdescription` varchar(100) NOT NULL,
`price` decimal(11,6) NOT NULL,
`username` varchar(50) NOT NULL,
`buyitnow` int(11) NOT NULL,
`enddate` datetime NOT NULL,
`purchases` int(11) NOT NULL,
`bids` int(11) NOT NULL,
`startingprice` decimal(11,6) NOT NULL,
`date` datetime NOT NULL,
`itemcondition` varchar(100) NOT NULL,
`international` int(11) NOT NULL,
`shipsto` varchar(100) NOT NULL,
`shipping` varchar(100) NOT NULL,
`shippingcost` decimal(11,6) NOT NULL,
`shippingtime` int(11) NOT NULL,
`location` varchar(100) NOT NULL,
`enabled` int(11) NOT NULL DEFAULT '1',
`category` varchar(50) NOT NULL,
`quantity` int(11) NOT NULL,
`offers` int(11) NOT NULL,
`returns` int(11) NOT NULL,
`images` text NOT NULL
) ENGINE=InnoDB AUTO_INCREMENT=94 DEFAULT CHARSET=latin1;
--
-- Dumping data for table `products`
--
INSERT INTO `products` (`id`, `title`, `description`, `shortdescription`, `price`, `username`, `buyitnow`, `enddate`, `purchases`, `bids`, `startingprice`, `date`, `itemcondition`, `international`, `shipsto`, `shipping`, `shippingcost`, `shippingtime`, `location`, `enabled`, `category`, `quantity`, `offers`, `returns`, `images`) VALUES
(84, 'balance', '', 'dfghgfds', '0.000000', 'admin', 0, '2015-03-19 17:40:24', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
(85, 'dfghdsdgb\r\n', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-19 17:41:06', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
(86, 'desk table\r\n', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-25 13:21:40', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 0, 0, 0, ''),
(87, 'ps3\r\n', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-25 13:21:40', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 0, 0, 0, ''),
(88, 'xbox one', '<div class="fullDetails"> <p>Xbox One brings together the best exclusive games like Titanfall and Halo, the most advanced multi-player and entertainment experiences you won''t find anywhere else.</p><ul><li>Parental controls allow you to set-up profiles for children to prevent unauthorised purchases and ensure they only access age appropriate content.</li><li>Game DVR keeps a rolling video record of gameplay and with Upload Studio you can edit clips, add voiceover and share them with your friends.</li><li>500GB hard drive give you plenty of memory for your games, demos, movies, apps, music and more.</li><li>Snap a game, live TV and apps like Netflix or YouTube side-by-side and switch quickly between them.</li><li>Experience the action like never before with the Xbox One Wireless Controller. New Impulse Triggers, redesigned thumbsticks and D-pad provide greater intensity, precision and comfort.</li><li>Keep your in-game communications crisp with the comfortable new Xbox One Chat Headset. Hear friends and foes in crystal-clear digital audio.</li><li>Includes Xbox One console, wireless controller, chat headset, HDMI cable, power supply, 14-Day Xbox Live Gold membership.</li><li>Built in blu-ray disc drive allows playback of blu-ray discs and 3D blu-ray discs.</li><li>500GB hard drive capacity.</li><li>Size H8, W27.4, D33.2cm.</li><li>EAN: 885370808315.</li></ul> </div> <!-- : 15113product.longdescription <tr><td>Name:</td> <td> product.longdescription </td></tr> <tr><td>DataType:</td> <td> MarketingContent </td></tr> <tr><td>ActivityIdentifier UniqueID:</td> <td> 11503 </td></tr> <tr><td>ActivityIdentifier Name:</td> <td> pdp_proddesc2colleft </td></tr> <tr><td>CampaignName:</td> <td> </td></tr> <tr><td>ActivityFormat:</td> <td> web </td></tr> <tr><td>ActivityPriority:</td> <td> 0 </td></tr> <tr><td>Url Link:</td> <td> </td></tr> <tr><td>Marketing Text:</td> <td> prod.long.description.content </td></tr> <tr><td>Location:</td> <td> </td></tr> <tr><td>Format UniqueID:</td> <td> 10009 </td></tr> <tr><td>Format Name:</td> <td> Widget </td></tr> <tr><td>Content Mime Type:</td> <td> </td></tr> <tr><td>Name:</td> <td> </td></tr> <tr><td>Short Description:</td> <td> </td></tr> <tr><td>Image:</td> <td> </td></tr> --> <div class="additionalinfo" id="additionalinfo"> <h4>Additional Information</h4> <p><img src="/wcsstore/argos/en_GB/images/p8/icon_dagger.gif" alt="This item is excluded from the 30 day money back guarantee. See the Additional Information panel for full details." nmcxl33="1"> Please note that this product is excluded from our 30 Day Money Back Guarantee. This does not affect your statutory rights.</p> <p>Prices correct as displayed but are subject to change</p> </div>', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-25 13:21:40', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 0, 0, 0, ''),
(89, 'xbox 360', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-25 13:21:40', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 0, 0, 0, ''),
(90, 'camera', '', 'dfghgfds', '1.000000', 'admin', 1, '2015-03-25 13:21:40', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 0, 0, 0, ''),
(91, 'sd card', 'main descript blah blah blah blah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blah', 'blah blah blah', '1.000000', 'demo', 0, '2015-03-26 17:21:00', 0, 0, '1.040000', '2015-03-18 13:21:40', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
(92, '22 Inch lg Tv lg22ma33d-pz', '<p>dfd</p>', 'dfghgfds', '0.000000', 'admin', 0, '2015-03-26 23:53:02', 0, 0, '99999.999999', '2015-03-19 23:53:02', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, ''),
(93, '22 Inch lg Tv lg22ma33d-pz', '', 'dfghgfds', '0.000000', 'admin', 0, '2015-03-27 14:42:47', 0, 0, '1.000000', '2015-03-20 14:42:47', 'new', 0, '', 'MyHermes', '1.000000', 0, 'United Kingdom', 1, '', 1, 0, 0, '');
答案 0 :(得分：3)
据推测，您希望where子句为：
WHERE (products.username = ? AND Now() > products.enddate) AND
(enabled = 1 OR bids > 0)
而不是解释它的方式：
WHERE (products.username = ? AND
Now() > products.enddate AND
enabled = 1
) OR bids > 0
答案 1 :(得分：0)
我相信这是您需要的查询：
SELECT *
FROM products
LEFT JOIN bids ON bids.bids_item = products.id
LEFT JOIN orders ON orders.orders_product = products.id
WHERE (
products.username = ?
AND Now() > products.enddate
AND enabled = 1
)
AND
(
bids > 0
OR orders.orders_product IS NOT NULL
OR bids.bids_item IS NOT NULL
)
GROUP BY products.id
ORDER BY bids.bids_amount DESC;
因为您需要已启用的产品已经已结束而且（我猜这里）赢得具有某个{的用户 {1}}。
此外，您希望此产品username上有一些出价，您希望OR orders OR表中包含记录。