mysql 交叉表，怎么把表的横向变成纵向？

[_Mon我们仍未知道那天所看见花的名字]

表结构如图：

怎么样才能变成这种结构：

comp_name prod_id prod_name 2015-12-12 2015-12-13 .............................
jkw_price 10566 ........ 228 228


表SQL与数据如下：

DROP TABLE IF EXISTS `tab_kr_prod_price_day`;
CREATE TABLE `tab_kr_prod_price_day` (
  `prod_id` varchar(20) DEFAULT NULL,
  `prod_name` varchar(255) DEFAULT NULL,
  `jkw_price` decimal(10,2) DEFAULT NULL,
  `yyw_price` decimal(10,2) DEFAULT NULL,
  `kad_price` decimal(10,2) DEFAULT NULL,
  `kdl_price` decimal(10,2) DEFAULT NULL,
  `jyw_price` decimal(10,2) DEFAULT NULL,
  `lbx_price` decimal(10,2) DEFAULT NULL,
  `ysk_price` decimal(10,2) DEFAULT NULL,
  `yk_price` decimal(10,2) DEFAULT NULL,
  `kzj_price` decimal(10,2) DEFAULT NULL,
  `dateforprice` datetime DEFAULT NULL,
  `tag` int(2) DEFAULT '0',
  `updatetime` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8

INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '228.00', '2015-12-12 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '228.00', '2015-12-13 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '230.00', '2015-12-14 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '230.00', '2015-12-15 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '230.00', '2015-12-16 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '230.00', '2015-12-17 00:00:00', '2', '2015-12-22 11:00:00');
INSERT INTO `tab_kr_prod_price_day` VALUES ('10566', '盐酸氟西汀胶囊(百优解)', '228.00', '228.00', '228.00', '248.00', '0.00', '0.00', '283.50', '0.00', '230.00', '2015-12-18 00:00:00', '1', '2015-12-22 11:00:00');

[ACMAIN_CHM]

http://blog.csdn.net/acmain_chm/article/details/4283943 MySQL交叉表 在某些数据库中有交叉表，但在MySQL中却没有这个功能，但网上看到有不少朋友想找出一个解决方法，特发贴集思广义。http://topic.csdn.net/u/20090530/23/0b782674-4b0b-4cf5-bc1a-e8914aaee5ab.html?96198现整理解法如下：数据样本： create table tx( id int primary key, c1 c...