【转】Mysql行转换为列

From : http://www.cnblogs.com/lhj588/archive/2012/06/15/2550392.html#

今晚需要统计数据生成简易报表，由原表格数据是单行的形式，最好转换为列表格式，由网上介绍方法实现如下：

希望获得的最终效果见下：

+-------+------+-------+-------+--------+--------+--------+---------------------+---------+
| 房间  | 房租 | 水费  | 电费  | 卫生费 | 电视费 | 网络费 | 记录时间            | total   |
+-------+------+-------+-------+--------+--------+--------+---------------------+---------+
| 0201  |  400 |     0 |     0 |     10 |      0 |      0 | 2011-02-08 11:01:21 |     410 |
| 0204  |  150 |     0 |     0 |     10 |      0 |      0 | 2011-02-08 11:00:21 |     160 |
| 0206  |  150 |     0 |     0 |     10 |      0 |      0 | 2011-01-16 18:02:50 |     160 |
| 0302  |  350 | 40.92 | 18.91 |     20 |     50 |     50 | 2011-01-18 01:45:23 |  529.83 |
| 0306  |  150 |     0 |     0 |     10 |      0 |      0 | 2011-02-08 11:23:15 |     160 |
| 0308  |  200 |     0 |     0 |     10 |      0 |      0 | 2011-03-28 22:26:41 |     210 |
| total | 1400 | 40.92 | 18.91 |     70 |     50 |     50 | 2011-03-28 22:26:41 | 1629.83 |
+-------+------+-------+-------+--------+--------+--------+---------------------+---------+

实现的SQL语句见下：

mysql>  SELECT
    ->      IFNULL(RoomNo,'total') AS 房间,
    ->      SUM(IF(FeeName='房租',FeeMoney,0)) AS 房租,
    ->      SUM(IF(FeeName='水费',FeeMoney,0)) AS 水费,
    ->      SUM(IF(FeeName='电费',FeeMoney,0)) AS 电费,
    ->      SUM(IF(FeeName='卫生费',FeeMoney,0)) AS 卫生费,
    ->      SUM(IF(FeeName='电视费',FeeMoney,0)) AS 电视费,
    ->      SUM(IF(FeeName='网络费',FeeMoney,0)) AS 网络费,
    ->      IFNULL(CDate, CDate) AS 记录时间,
    ->      SUM(IF(FeeName='total',FeeMoney,0)) AS total
    ->  FROM (
    -> select no.RoomNo as RoomNo, IFNULL(f.FeeName, 'total') as FeeName, SUM(f.FeeMoney) as FeeMoney, f.CreateDate as CDate
    -> from roomnoinfo no, Fee f
    -> where no.bid=1 and no.beempty='full' and no.RoomNo=f.RoomNo and
    -> f.CreateDate < '2011-03-31' and f.CreateDate >'2011-01-01'
    -> GROUP BY RoomNO, FeeName
    -> WITH ROLLUP
    -> HAVING RoomNO IS NOT NULL
    ->  ) AS A
    ->  GROUP BY RoomNo
    ->  WITH ROLLUP;

源数据的表格式如下：

mysql> select RoomNo, CreateDate, FeeName, FeeMoney from Fee where bid=1;
+--------+---------------------+---------+----------+
| RoomNo | CreateDate          | FeeName | FeeMoney |
+--------+---------------------+---------+----------+
| 0101   | 2011-01-15 22:41:24 | 房租    |      200 |
| 0101   | 2011-01-15 22:41:24 | 水费    |     13.2 |
| 0101   | 2011-01-15 22:41:24 | 电费    |      6.1 |
| 0102   | 2011-01-16 17:01:52 | 房租    |      150 |
| 0102   | 2011-01-16 17:01:52 | 水费    |    145.2 |
| 0102   | 2011-01-16 17:01:52 | 电费    |     67.1 |
| 0102   | 2011-01-16 17:01:52 | 卫生费  |       10 |
| 0204   | 2011-02-08 11:00:21 | 房租    |      150 |
| 0204   | 2011-02-08 11:00:21 | 水费    |     NULL |
| 0204   | 2011-02-08 11:00:21 | 电费    |     NULL |
| 0204   | 2011-02-08 11:00:21 | 卫生费  |       10 |
| 0206   | 2011-01-16 18:02:50 | 房租    |      150 |
| 0206   | 2011-01-16 18:02:50 | 水费    |     NULL |
| 0206   | 2011-01-16 18:02:50 | 电费    |     NULL |
| 0206   | 2011-01-16 18:02:50 | 卫生费  |       10 |
| 0302   | 2011-01-18 01:42:35 | 房租    |      150 |
| 0302   | 2011-01-18 01:42:35 | 水费    |    40.92 |
| 0302   | 2011-01-18 01:42:35 | 电费    |    18.91 |
| 0302   | 2011-01-18 01:42:35 | 卫生费  |       10 |
| 0302   | 2011-01-18 01:45:23 | 卫生费  |       10 |
| 0302   | 2011-01-18 01:45:23 | 房租    |      200 |
| 0302   | 2011-01-18 01:45:23 | 网络费  |       50 |
| 0302   | 2011-01-18 01:45:23 | 电视费  |       50 |
| 0306   | 2011-02-08 11:23:15 | 房租    |      150 |
| 0306   | 2011-02-08 11:23:15 | 水费    |     NULL |
| 0306   | 2011-02-08 11:23:15 | 电费    |     NULL |
| 0306   | 2011-02-08 11:23:15 | 卫生费  |       10 |
| 0308   | 2011-03-28 22:26:41 | 房租    |      200 |
| 0308   | 2011-03-28 22:26:41 | 水费    |     NULL |
| 0308   | 2011-03-28 22:26:41 | 电费    |     NULL |
| 0308   | 2011-03-28 22:26:41 | 卫生费  |       10 |
+--------+---------------------+---------+----------+
31 rows in set (0.02 sec)

原文介绍地址 http://blogold.chinaunix.net/u3/90603/showart_2017912.html

数据样本：

create table tx(
id int primary key,
c1 char(2),
c2 char(2),
c3 int
);

insert into tx values
(1 ,'A1','B1',9),
(2 ,'A2','B1',7),
(3 ,'A3','B1',4),
(4 ,'A4','B1',2),
(5 ,'A1','B2',2),
(6 ,'A2','B2',9),
(7 ,'A3','B2',8),
(8 ,'A4','B2',5),
(9 ,'A1','B3',1),
(10 ,'A2','B3',8),
(11 ,'A3','B3',8),
(12 ,'A4','B3',6),
(13 ,'A1','B4',8),
(14 ,'A2','B4',2),
(15 ,'A3','B4',6),
(16 ,'A4','B4',9),
(17 ,'A1','B4',3),
(18 ,'A2','B4',5),
(19 ,'A3','B4',2),
(20 ,'A4','B4',5);

mysql> select * from tx;
+----+------+------+------+
| id | c1   | c2   | c3   |
+----+------+------+------+
|  1 | A1   | B1   |    9 |
|  2 | A2   | B1   |    7 |
|  3 | A3   | B1   |    4 |
|  4 | A4   | B1   |    2 |
|  5 | A1   | B2   |    2 |
|  6 | A2   | B2   |    9 |
|  7 | A3   | B2   |    8 |
|  8 | A4   | B2   |    5 |
|  9 | A1   | B3   |    1 |
| 10 | A2   | B3   |    8 |
| 11 | A3   | B3   |    8 |
| 12 | A4   | B3   |    6 |
| 13 | A1   | B4   |    8 |
| 14 | A2   | B4   |    2 |
| 15 | A3   | B4   |    6 |
| 16 | A4   | B4   |    9 |
| 17 | A1   | B4   |    3 |
| 18 | A2   | B4   |    5 |
| 19 | A3   | B4   |    2 |
| 20 | A4   | B4   |    5 |
+----+------+------+------+
20 rows in set (0.00 sec)

mysql>

期望结果

+------+-----+-----+-----+-----+------+
|C1    |B1   |B2   |B3   |B4   |Total |
+------+-----+-----+-----+-----+------+
|A1    |9    |2    |1    |11   |23    |
|A2    |7    |9    |8    |7    |31    |
|A3    |4    |8    |8    |8    |28    |
|A4    |2    |5    |6    |14   |27    |
|Total |22   |24   |23   |40   |109   |
+------+-----+-----+-----+-----+------+

1. 利用SUM(IF()) 生成列 + WITH ROLLUP 生成汇总行,并利用 IFNULL将汇总行标题显示为 Total

mysql> SELECT
    ->     IFNULL(c1,'total') AS total,
    ->     SUM(IF(c2='B1',c3,0)) AS B1,
    ->     SUM(IF(c2='B2',c3,0)) AS B2,
    ->     SUM(IF(c2='B3',c3,0)) AS B3,
    ->     SUM(IF(c2='B4',c3,0)) AS B4,
    ->     SUM(IF(c2='total',c3,0)) AS total
    -> FROM (
    ->     SELECT c1,IFNULL(c2,'total') AS c2,SUM(c3) AS c3
    ->     FROM tx
    ->     GROUP BY c1,c2
    ->     WITH ROLLUP
    ->     HAVING c1 IS NOT NULL
    -> ) AS A
    -> GROUP BY c1
    -> WITH ROLLUP;
+-------+------+------+------+------+-------+
| total | B1   | B2   | B3   | B4   | total |
+-------+------+------+------+------+-------+
| A1    |    9 |    2 |    1 |   11 |    23 |
| A2    |    7 |    9 |    8 |    7 |    31 |
| A3    |    4 |    8 |    8 |    8 |    28 |
| A4    |    2 |    5 |    6 |   14 |    27 |
| total |   22 |   24 |   23 |   40 |   109 |
+-------+------+------+------+------+-------+
5 rows in set, 1 warning (0.00 sec)

2. 利用SUM(IF()) 生成列 + UNION 生成汇总行,并利用 IFNULL将汇总行标题显示为 Total
mysql> select c1,
    -> sum(if(c2='B1',C3,0)) AS B1,
    -> sum(if(c2='B2',C3,0)) AS B2,
    -> sum(if(c2='B3',C3,0)) AS B3,
    -> sum(if(c2='B4',C3,0)) AS B4,SUM(C3) AS TOTAL
    -> from tx
    -> group by C1
    -> UNION
    -> SELECT 'TOTAL',sum(if(c2='B1',C3,0)) AS B1,
    -> sum(if(c2='B2',C3,0)) AS B2,
    -> sum(if(c2='B3',C3,0)) AS B3,
    -> sum(if(c2='B4',C3,0)) AS B4,SUM(C3) FROM TX
    -> ;
+-------+------+------+------+------+-------+
| c1    | B1   | B2   | B3   | B4   | TOTAL |
+-------+------+------+------+------+-------+
| A1    |    9 |    2 |    1 |   11 |    23 |
| A2    |    7 |    9 |    8 |    7 |    31 |
| A3    |    4 |    8 |    8 |    8 |    28 |
| A4    |    2 |    5 |    6 |   14 |    27 |
| TOTAL |   22 |   24 |   23 |   40 |   109 |
+-------+------+------+------+------+-------+
5 rows in set (0.00 sec)

mysql>

3.  利用SUM(IF()) 生成列,直接生成结果不再利用子查询
mysql> select ifnull(c1,'total'),
    -> sum(if(c2='B1',C3,0)) AS B1,
    -> sum(if(c2='B2',C3,0)) AS B2,
    -> sum(if(c2='B3',C3,0)) AS B3,
    -> sum(if(c2='B4',C3,0)) AS B4,SUM(C3) AS TOTAL
    -> from tx
    -> group by C1 with rollup ;
+--------------------+------+------+------+------+-------+
| ifnull(c1,'total') | B1   | B2   | B3   | B4   | TOTAL |
+--------------------+------+------+------+------+-------+
| A1                 |    9 |    2 |    1 |   11 |    23 |
| A2                 |    7 |    9 |    8 |    7 |    31 |
| A3                 |    4 |    8 |    8 |    8 |    28 |
| A4                 |    2 |    5 |    6 |   14 |    27 |
| total              |   22 |   24 |   23 |   40 |   109 |
+--------------------+------+------+------+------+-------+
5 rows in set (0.00 sec)

mysql>

4. 动态，适用于列不确定情况，

mysql> SET @EE='';
mysql> SELECT @EE:=CONCAT(@EE,'SUM(IF(C2=\'',C2,'\'',',C3,0)) AS ',C2,',') FROM (SELECT DISTINCT C2 FROM TX) A;

mysql> SET @QQ=CONCAT('SELECT ifnull(c1,\'total\'),',LEFT(@EE,LENGTH(@EE)-1),' ,SUM(C3) AS TOTAL FROM TX GROUP BY C1 WITH ROLLUP');
Query OK, 0 rows affected (0.00 sec)

mysql> PREPARE stmt2 FROM @QQ;
Query OK, 0 rows affected (0.00 sec)
Statement prepared

mysql> EXECUTE stmt2;
+--------------------+------+------+------+------+-------+
| ifnull(c1,'total') | B1   | B2   | B3   | B4   | TOTAL |
+--------------------+------+------+------+------+-------+
| A1                 |    9 |    2 |    1 |   11 |    23 |
| A2                 |    7 |    9 |    8 |    7 |    31 |
| A3                 |    4 |    8 |    8 |    8 |    28 |
| A4                 |    2 |    5 |    6 |   14 |    27 |
| total              |   22 |   24 |   23 |   40 |   109 |
+--------------------+------+------+------+------+-------+
5 rows in set (0.00 sec)

mysql>

以上均由网友 liangCK , wwwwb , WWWWA , dap570 提供, 再次感谢他们的支持。

其实数据库中也可以用 CASE WHEN / DECODE 代替 IF

【转】Mysql行转换为列的更多相关文章

MYSQL 行转列以及基本的聚合函数count，与group by 以及distinct组合使用
在统计查询中,经常会用到count函数,这里是基础的 MYSQL 行转列以及基本的聚合函数count,与group by 以及distinct组合使用 -- 创建表 CREATE TABLE `tb ...
excel中怎么将行转换为列及列转换成行
操作方法 01 选中要把行转换为列的数据.然后点击键盘上的ctrl+c. 02 在需要放置的单元格上,右键点击,然后点击菜单上的‘选择性粘贴’. 03 在弹出的窗口上,点击勾选上‘转置’.点击确定按钮 ...
MySQL 行转列 -》动态行转列 -》动态行转列带计算
Pivot Table Using MySQL - A Complete Guide | WebDevZoomhttp://webdevzoom.com/pivot-table-using-mysql ...
MySql 行转列存储过程实现
同学们在使用mysql的过程中,会遇到一个行转列的问题,就是把多条数据转化成一条数据用多列显示. 方法1. 实现方式用下面的存储过程,表名对应的修改就行. BEGIN declare current ...
mysql行转列，函数GROUP_CONCAT(expr)
demo: 语句: SELECT '行' id, '' product_nameUNIONSELECT id, product_name FROM `product` WHERE id < 5 ...
mysql行转列问题 SUM(IF(条件,列值,0))
sum(if(条件,列值,0))语法用例: select name,sum(if(subject="语文",score,0)) as "语文" from gra ...
mysql行转列、列转行示例
最近在开发过程中遇到问题,需要将数据库中一张表信息进行行转列操作,再将每列(即每个字段)作为与其他表进行联表查询的字段进行显示. 借此机会,在网上查阅了相关方法,现总结出一种比较简单易懂的方法备用. ...
MySQL行转列、列转行
一.行转列有如图所示的表,现在希望查询的结果将行转成列建表语句如下: CREATE TABLE `TEST_TB_GRADE` ( `ID` int(10) NOT NULL AUTO_INCRE ...
mysql 行转列列转行
一.行转列即将原本同一列下多行的不同内容作为多个字段,输出对应内容. 建表语句 DROP TABLE IF EXISTS tb_score; CREATE TABLE tb_score( id ) ...

随机推荐

sed匹配多行替换
sed -i '/aaa/{:a;n;s/123/xyz/g;/eee/!ba}' yourfile 如题:aaa123123123123123eee怎么匹配aaa~eee(开始结束字符串确定),然后 ...
Marriage is Stable HDU1522 稳定婚姻问题基础
几对男女给出每个人心中的优先级进行最合理的匹配要打印名字的话必须有一个名字数组英文名用map 稳定婚姻问题: 每次循环遍历所有的男的每个男的对目前未被拒绝的并且优先级最高的进行预匹配 ...
java学习之借书系统
实现的图书借阅系统要处理用户输入的非法参数,并引导用户正确使用测试结果: 主要目的就是练习异常处理中的Exception类的使用使用的相关语法 try{ //可能产生异常的代码块 }catch(E ...
循序渐进学.Net Core Web Api开发系列【15】：应用安全
系列目录循序渐进学.Net Core Web Api开发系列目录本系列涉及到的源码下载地址:https://github.com/seabluescn/Blog_WebApi 一.概述本篇介绍W ...
ArduinoYun教程之ArduinoYun硬件介绍
ArduinoYun教程之ArduinoYun硬件介绍 ArduinoYun的电源插座 Arduino Yun有两排插座,这些插座可以按类型分为三类:电源.数字IO和模拟输入.电源部分主要集中在如图1 ...
VM 操作系统实例化(基于 KVM 的虚拟化研究及应用--崔泽永（2011）)的论文笔记
一.VM操作系统实例化 1.建立虚拟磁盘镜像虚拟磁盘镜像在逻辑上是提供给虚拟机使用的硬盘, 在物理上可以是 L inux系统内一普通镜像文件, 也可以是真实的物理磁盘或分区. 本方案设计中将虚拟机 ...
BZOJ3616 : War
对每个点维护一个bitset,记录哪些点可以攻击它. 可以通过kd-tree+标记永久化实现. 对于一个阵营,它在m轮之后防御系统全部完好的概率为$(1-\frac{攻击它的点数}{n})^m$. 时 ...
inline关键字的作用
一.在C&C++中,inline关键字用来定义一个类的内联函数,引入它的主要原因是用它替代C中表达式形式的宏定义. 如下面一宏定义表达式: #define express(v1,v2) (v1 ...
【原】使用Eclipse远程Debug测试环境
[环境参数] Eclipse:Version: Mars.2 Release (4.5.2) Linux:centOS 6.5 [简述] Java自身支持调试功能,并提供了一个简单的调试工具--JDB ...
OpenVPN使用easy-rsa3吊销证书
cd /etc/easy-rsa ./easyrsa revoke targetkey(证书名) ./easyrsa gen-crl 其中gen-crl会生成一份吊销证书的名单,放在pki/crl.p ...

【转】Mysql行转换为列

【转】Mysql行转换为列的更多相关文章

随机推荐

热门专题