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MySQL] 行列转换变化各种方法实现总结(行变列报表统计、列变行数据记录统计等)

2017-02-20 09:58 1016 查看
  前言:

行列变化,最难的就是将多个列变成多行,使用的比较多的是统计学中行变列,列变行,没有找到现成的函数或者语句,所以自己写了存储过程,使用动态 sql 来实现,应用业务场景,用户每个月都有使用记录数录入一张表,一个月一个字段,所以表的字段是动态增长的,现在需要实时统计当前用户使用的总数量,如果你知道有多少个字段,那么可以用 select c1+c2+c3+…. From tbname where tid=’111’; 来实现,但是关键是这个都是动态的,所以在应用程序端来实现确实不适宜,可以放在数据库后台在存储过程里实现。

而且在行变成列中,如果要写单个 sql 来实现,列的数目就需要写死,因为如果不知道要展示成多少列的话,就需要用动态变量,而一条 sql 里面无法使用动态变量。但是可以使用 sql

块来实现动态的效果。


一,列变成行例子演示


1 ,准备测试数据

这是基础数据表,里面有多个字段wm201403…… ,现在需要把N 个这样的列变成行数据。
USE csdn;
DROP TABLE IF EXISTS flow_table;
CREATE TABLE `flow_table` (
`ID` INT(11) NOT NULL AUTO_INCREMENT,
`Number` BIGINT(11) NOT NULL,
`City` VARCHAR(10) NOT NULL,
`wm201403` DECIMAL(7,2) DEFAULT NULL,
`wm201404` DECIMAL(7,2) DEFAULT NULL,
`wm201405` DECIMAL(7,2) DEFAULT NULL,
`wm201406` DECIMAL(7,2) DEFAULT NULL,
`wm201407` DECIMAL(7,2) DEFAULT NULL,
`wm201408` DECIMAL(7,2) DEFAULT NULL,
PRIMARY KEY (`ID`,`Number`)
) ENGINE=INNODB   DEFAULT CHARSET=utf8;


录入一批测试数据:
INSERT INTO flow_table(Number,City,wm201403,wm201404,wm201405,wm201406,wm201407,wm201408)SELECT 1,'shanghai',100.2,180.4,141,164,124,127;
INSERT INTO flow_table(Number,City,wm201403,wm201404,wm201405,wm201406,wm201407,wm201408)SELECT 2,'shanghai',110.23,180.34,141.23,104.78,124.67,127.45;
INSERT INTO flow_table(Number,City,wm201403,wm201404,wm201405,wm201406,wm201407,wm201408)SELECT 3,'beijing',123.23,110.34,131.33,154.58,154.67,167.45;
INSERT INTO flow_table(Number,City,wm201403,wm201404,wm201405,wm201406,wm201407,wm201408)SELECT 4,'hangzhou',0,110.34,131.33,154.58,154.67,0;
INSERT INTO flow_table(Number,City,wm201405,wm201406,wm201407,wm201408)SELECT 5,'hangzhou',131.33,154.58,154.67,0;


需要达到的统计效果是:

+--------+-----------+

| Number | total_num |

+--------+-----------+

|      1 |    836.60 |

|      2 |    788.70 |

|      3 |    841.60 |

|      4 |    550.92 |

|      5 |    440.58 |

+--------+-----------+

5 rows in set (0.00 sec)


2 ,存储过程遍历:

这个存储过程建立了 2 张临时表,查询测试表数据形成游标,遍历游标根据主键 Number 来调用 pro_flow_modify 存储过程进行行列变化。代码如下:
DELIMITER $$
DROP PROCEDURE IF EXISTS csdn.`proc_all_changes`$$
CREATE PROCEDURE csdn.proc_all_changes()
BEGIN
DECLARE v_number BIGINT;
DECLARE v_city VARCHAR(10);
DECLARE _done INT DEFAULT 0;

/*定义游标*/
DECLARE cur_all CURSOR FOR SELECT Number,City FROM csdn.`flow_table`;
/**这里如果需要定义下当NOT FOUND的时候,EXIT退出游标遍历,不然如果设置成CONTINUE会一直执行下去。*/
DECLARE EXIT HANDLER FOR NOT FOUND BEGIN SET _done=1;END;

/*建立临时表,存放所有字段的临时表*/
DROP TABLE IF EXISTS flow_n_columns;
CREATE TABLE `flow_n_columns` (
`column_name` VARCHAR(10) NOT NULL
) ENGINE=INNODB DEFAULT CHARSET=utf8;

/*存放最终变成行的数据表*/
DROP TABLE IF EXISTS flow_tmp;
CREATE TABLE `flow_tmp` (
`Number` INT(11) DEFAULT NULL,
`City` VARCHAR(10) DEFAULT NULL,
`wm_str` VARCHAR(10) DEFAULT NULL,
`Wm` DECIMAL(7,2) DEFAULT NULL
) ENGINE=INNODB DEFAULT CHARSET=utf8;

OPEN cur_all;
REPEAT
FETCH cur_all INTO v_number, v_city;
IF NOT _done THEN
CALL csdn.pro_flow_modify(v_number,v_city);
END IF;
UNTIL _done=1 END REPEAT;
CLOSE cur_all;
/*展示下所有的行转列的数据**/
SELECT * FROM csdn.flow_tmp;
END$$
DELIMITER ;


3 ,行里变化存储过程

通过查询系统表 information_schema.`COLUMNS` 来获取测试表 flow_table 的所有列,然后写动态 SQL ,来把列的值录入到临时表 flow_tmp 中。
DELIMITER $$
DROP PROCEDURE IF EXISTS csdn.`pro_flow_modify`$$
CREATE PROCEDURE csdn.`pro_flow_modify`(p_Number INT,p_city VARCHAR(10))
BEGIN
DECLARE v_column_name VARCHAR(10) DEFAULT '';
DECLARE v_exe_sql VARCHAR(1000) DEFAULT '';
DECLARE v_start_wm VARCHAR(10) DEFAULT '';
DECLARE v_end_wm VARCHAR(10) DEFAULT '';
DECLARE v_num  DECIMAL(10,2) DEFAULT 0;

DECLARE i INT DEFAULT 1;
DECLARE v_Number INT DEFAULT 0;
SET v_Number=p_Number;

DELETE FROM csdn.flow_n_columns;
DELETE FROM csdn.flow_tmp WHERE Number=v_Number;

/*把测试表flow_table的所有字段都录入字段临时表中,这样就达到了从列变成行的目的*/
INSERT INTO flow_n_columns
SELECT t.`COLUMN_NAME` FROM information_schema.`COLUMNS` t WHERE t.`TABLE_NAME`='flow_table' AND t.`TABLE_SCHEMA`='csdn' AND t.`COLUMN_NAME` NOT IN('ID','Number','City');
SELECT column_name INTO v_column_name FROM csdn.flow_n_columns LIMIT 1;

/*开始循环遍历字段临时表的字段数据,并且把字段值放入临时表flow_tmp里面*/
WHILE i>0 DO
SET v_exe_sql=CONCAT('INSERT INTO csdn.flow_tmp(Number,City,wm_str,Wm) select ',v_Number,',\'',p_city, '\',\'',v_column_name,'\',',v_column_name,' from csdn.flow_table WHERE flow_table.Number=',v_Number,';');
SET @sql=v_exe_sql;
PREPARE s1 FROM @sql;
EXECUTE s1;
DEALLOCATE PREPARE s1;
DELETE FROM csdn.flow_n_columns WHERE column_name=v_column_name;
SELECT column_name INTO v_column_name FROM csdn.flow_n_columns LIMIT 1;
SELECT COUNT(1) INTO i FROM csdn.flow_n_columns ;
DELETE FROM csdn.flow_tmp WHERE Wm=0;
END WHILE;

/*由于触发器是不支持动态sql,所以不能使用while循环,动态遍历所有统计列的,只能写死列了,如下所示:
现在一个个insert只能写死了, flow_table表有多少个统计列就写多少个insert sql,以后新添加一个列,就在这里新添加一条insertsql语句
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201403',wm201403 FROM flow_table WHERE Number=v_Number ;
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201404',wm201404 FROM flow_table WHERE Number=v_Number ;
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201405',wm201405 FROM flow_table WHERE Number=v_Number ;
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201406',wm201406 FROM flow_table WHERE Number=v_Number ;
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201407',wm201407 FROM flow_table WHERE Number=v_Number ;
INSERT INTO flow_tmp(Number,City,wm_str,Wm) SELECT v_Number,p_city,'wm201408',wm201408 FROM flow_table WHERE Number=v_Number ;
*/

/*清除掉不数据=0的列*/
DELETE FROM csdn.flow_tmp WHERE Wm=0 OR Wm IS NULL;

SELECT wm_str INTO v_start_wm FROM csdn.flow_tmp WHERE Number=v_Number ORDER BY wm_str ASC LIMIT 1;
SELECT wm_str INTO v_end_wm FROM csdn.flow_tmp WHERE Number=v_Number ORDER BY wm_str DESC LIMIT 1;
SELECT SUM(Wm) INTO v_num FROM csdn.flow_tmp WHERE Number=v_Number;

END$$

DELIMITER ;


4 ,列变行结果展示

临时表的所有数据:
mysql> SELECT * FROM csdn.flow_tmp;
+--------+----------+----------+--------+
| Number | City     | wm_str   | Wm     |
+--------+----------+----------+--------+
|      1 | shanghai | wm201403 | 100.20 |
|      1 | shanghai | wm201404 | 180.40 |
|      1 | shanghai | wm201405 | 141.00 |
|      1 | shanghai | wm201406 | 164.00 |
|      1 | shanghai | wm201407 | 124.00 |
|      1 | shanghai | wm201408 | 127.00 |
|      2 | shanghai | wm201403 | 110.23 |
|      2 | shanghai | wm201404 | 180.34 |
|      2 | shanghai | wm201405 | 141.23 |
|      2 | shanghai | wm201406 | 104.78 |
|      2 | shanghai | wm201407 | 124.67 |
|      2 | shanghai | wm201408 | 127.45 |
|      3 | beijing  | wm201403 | 123.23 |
|      3 | beijing  | wm201404 | 110.34 |
|      3 | beijing  | wm201405 | 131.33 |
|      3 | beijing  | wm201406 | 154.58 |
|      3 | beijing  | wm201407 | 154.67 |
|      3 | beijing  | wm201408 | 167.45 |
|      4 | hangzhou | wm201404 | 110.34 |
|      4 | hangzhou | wm201405 | 131.33 |
|      4 | hangzhou | wm201406 | 154.58 |
|      4 | hangzhou | wm201407 | 154.67 |
|      5 | hangzhou | wm201405 | 131.33 |
|      5 | hangzhou | wm201406 | 154.58 |
|      5 | hangzhou | wm201407 | 154.67 |
+--------+----------+----------+--------+
25 rows in set (0.00 sec)
mysql>


统计每个用户的使用总量为:
mysql> SELECT Number,SUM(Wm) 'total_num' FROM flow_tmp GROUP BY Number ORDER BY Number;
+--------+-----------+
| Number | total_num |
+--------+-----------+
|      1 |    836.60 |
|      2 |    788.70 |
|      3 |    841.60 |
|      4 |    550.92 |
|      5 |    440.58 |
+--------+-----------+
5 rows in set (0.00 sec)

mysql>


二,行变列例子演示


1 ,准备测试数据

USE csdn;
DROP TABLE IF EXISTS csdn.tb;
CREATE TABLE tb(`cname` VARCHAR(10),cource VARCHAR(10),score INT) ENGINE=INNODB;

INSERT INTO tb VALUES('张三','语文',74);
INSERT INTO tb VALUES('张三','数学',83);
INSERT INTO tb VALUES('张三','物理',93);
INSERT INTO tb VALUES('李四','语文',74);
INSERT INTO tb VALUES('李四','数学',84);
INSERT INTO tb VALUES('李四','物理',94);

SELECT * FROM tb;


需要得到的结果是:

+--------------------+--------+--------+--------+-----------+--------------+

| 姓名               | 语文   | 数学   | 物理   | 总成绩    | 平均成绩     |

+--------------------+--------+--------+--------+-----------+--------------+

| 张三               |  74.00 |  83.00 |  93.00 |    250.00 |        83.33 |

| 李四               |  74.00 |  84.00 |  94.00 |    252.00 |        84.00 |

| 总成绩平均数       |  74.00 |  83.50 |  93.50 |    251.00 |        83.67 |

+--------------------+--------+--------+--------+-----------+--------------+

2 ,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_num

SQL 代码块如下:
SELECT cname AS "姓名",
SUM(IF(cource="语文",score,0)) AS "语文",
SUM(IF(cource="数学",score,0)) AS "数学",
SUM(IF(cource="物理",score,0)) AS "物理",
SUM(score) AS "总成绩",
ROUND(AVG(score),2) AS "平均成绩"
FROM tb
GROUP BY cname
UNION ALL
SELECT
"总成绩平均数",
ROUND(AVG(`语文`),2) , ROUND(AVG(`数学`),2), ROUND(AVG(`物理`),2), ROUND(AVG(`总成绩`),2), ROUND(AVG(`平均成绩`),2)
FROM(
SELECT "all",cname AS "姓名",
SUM(IF(cource="语文",score,0)) AS "语文",
SUM(IF(cource="数学",score,0)) AS "数学",
SUM(IF(cource="物理",score,0)) AS "物理",
SUM(score) AS "总成绩",
AVG(score) AS "平均成绩"
FROM tb
GROUP BY cname
)tb2
GROUP BY tb2.all;


执行结果正确,如下所示:

+--------------------+--------+--------+--------+-----------+--------------+

| 姓名               | 语文   | 数学   | 物理   | 总成绩    | 平均成绩     |

+--------------------+--------+--------+--------+-----------+--------------+

| 张三               |  74.00 |  83.00 |  93.00 |    250.00 |        83.33 |

| 李四               |  74.00 |  84.00 |  94.00 |    252.00 |        84.00 |

| 总成绩平均数       |  74.00 |  83.50 |  93.50 |    251.00 |        83.67 |

+--------------------+--------+--------+--------+-----------+--------------+


3 ,利用 max(CASE ... WHEN ... THEN .. ELSE END) AS " 语文 " 的方式来实现

 SQL代码如下:
SELECT
cname AS "姓名",
MAX(CASE cource WHEN "语文" THEN score ELSE 0 END) AS "语文",
MAX(CASE cource WHEN "数学" THEN score ELSE 0 END) AS "数学",
MAX(CASE cource WHEN "物理" THEN score ELSE 0 END) AS "物理",
SUM(score) AS "总成绩",
ROUND(AVG(score) ,2) AS "平均成绩"
FROM tb
GROUP BY `cname`
UNION ALL
SELECT
"总成绩平均数",
ROUND(AVG(`语文`),2) , ROUND(AVG(`数学`),2), ROUND(AVG(`物理`),2), ROUND(AVG(`总成绩`),2), ROUND(AVG(`平均成绩`),2)
FROM(	SELECT 'all' ,
cname AS "姓名",
MAX(CASE cource WHEN "语文" THEN score ELSE 0 END) AS "语文",
MAX(CASE cource WHEN "数学" THEN score ELSE 0 END) AS "数学",
MAX(CASE cource WHEN "物理" THEN score ELSE 0 END) AS "物理",
SUM(score) AS "总成绩",
ROUND(AVG(score) ,2) AS "平均成绩"
FROM tb
GROUP BY `cname`
)tb2 GROUP BY tb2.all


执行结果正确,如下所示:

+--------------------+--------+--------+--------+-----------+--------------+

| 姓名               | 语文   | 数学   | 物理   | 总成绩    | 平均成绩     |

+--------------------+--------+--------+--------+-----------+--------------+

| 张三               |  74.00 |  83.00 |  93.00 |    250.00 |        83.33 |

| 李四               |  74.00 |  84.00 |  94.00 |    252.00 |        84.00 |

| 总成绩平均数       |  74.00 |  83.50 |  93.50 |    251.00 |        83.67 |

+--------------------+--------+--------+--------+-----------+--------------+


4 ,利用  WITH rollup 结果不符合

SQL代码如下:

SELECT IFNULL(cname,'总平均数') AS "姓名",
MAX(CASE cource WHEN "语文" THEN score ELSE 0 END) AS "语文",
MAX(CASE cource WHEN "数学" THEN score ELSE 0 END) AS "数学",
MAX(CASE cource WHEN "物理" THEN score ELSE 0 END) AS "物理",
ROUND(AVG(score),2) AS "总成绩",
ROUND(AVG(avg_score),2) AS "平均成绩"
FROM(
SELECT
cname ,
IFNULL(cource,'total') cource,
SUM(score) AS score,
ROUND(AVG(score) ,2) AS avg_score
FROM tb
GROUP BY `cname`,cource WITH ROLLUP HAVING cname IS NOT NULL
)tb2
GROUP BY  tb2.cname WITH ROLLUP;


执行结果不对,总平均数栏目,里面各科比较语文数学的班级平均数不对,如下所示:
mysql>	 SELECT IFNULL(cname,'总平均数') AS "姓名",
-> MAX(CASE cource WHEN "语文" THEN score ELSE 0 END) AS "语文",
-> MAX(CASE cource WHEN "数学" THEN score ELSE 0 END) AS "数学",
-> MAX(CASE cource WHEN "物理" THEN score ELSE 0 END) AS "物理",
-> ROUND(AVG(score),2) AS "总成绩",
-> ROUND(AVG(avg_score),2) AS "平均成绩"
->	 FROM(
-> SELECT
->
Display ALL 793 possibilities? (Y OR n)
-> cname ,
->
Display ALL 793 possibilities? (Y OR n)
-> IFNULL(cource,'total') cource,
->
Display ALL 793 possibilities? (Y OR n)
-> SUM(score) AS score,
->
Display ALL 793 possibilities? (Y OR n)
-> ROUND(AVG(score) ,2) AS avg_score
-> FROM tb
-> GROUP BY `cname`,cource WITH ROLLUP HAVING cname IS NOT NULL
-> )tb2
-> GROUP BY  tb2.cname WITH ROLLUP;
+--------------+--------+--------+--------+-----------+--------------+
| 姓名		 | 语文   | 数学   | 物理   | 总成绩	| 平均成绩	 |
+--------------+--------+--------+--------+-----------+--------------+
| 张三		 |	 74 |	 83 |	 93 |	125.00 |		83.33 |
| 李四		 |	 74 |	 84 |	 94 |	126.00 |		84.00 |
| 总平均数	 |	 74 |	 84 |	 94 |	125.50 |		83.67 |
+--------------+--------+--------+--------+-----------+--------------+
3 ROWS IN SET, 1 warning (0.00 sec)

mysql>


总结: WITH rollup中对求列的总数是OK的,但是求列的平均数有偏差,这里场景使用不是恰当。


5 ,使用动态 SQL 来实现

SQL 代码块如下:
/*仅仅班级成员部分*/
SET @a='';
SELECT @a:=CONCAT(@a,'SUM(IF(cource=\'',cource,'\'',',score,0)) AS ',cource,',') FROM (SELECT DISTINCT cource FROM tb) A;
SET @a=CONCAT(@a,"ROUND(AVG(score) ,2) AS \"平均成绩\"");
SET @b=CONCAT('SELECT IFNULL(cname,\'总成绩\'),',LEFT(@a,LENGTH(@a)-1),' ,SUM(score) AS \"总成绩\" FROM tb GROUP BY cname ');

/*班级成员总计部分**/
SET @a2="";
SET @b2=CONCAT('SELECT "all",IFNULL(cname,\'总成绩\'),',LEFT(@a,LENGTH(@a)-1),' ,SUM(score) AS \"总成绩\" FROM tb GROUP BY cname ');
SELECT @a2:=CONCAT(@a2,'ROUND(AVG(`',cource,'`),2),') FROM (SELECT DISTINCT cource FROM tb) A;
SET @a2=CONCAT(@a2," ROUND(AVG(`平均成绩`),2),ROUND(AVG(`总成绩`),2) ");
SET @c=CONCAT("SELECT \"班级平均数\",",LEFT(@a2,LENGTH(@a)-1)," FROM(",@b2,")tb2 GROUP BY tb2.all;");
SET @d=CONCAT(@b," UNION ALL ",@c);

PREPARE stmt1 FROM @d;
EXECUTE stmt1;


查看执行结果如下,已经达到效果:
mysql> /*仅仅班级成员部分*/
mysql> SET @a='';
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SELECT @a:=CONCAT(@a,'SUM(IF(cource=\'',cource,'\'',',score,0)) AS ',cource,',') FROM (SELECT DISTINCT cource FROM tb) A;
+-----------------------------------------------------------------------------------------------------------------------------------+
| @a:=CONCAT(@a,'SUM(IF(cource=\'',cource,'\'',',score,0)) AS ',cource,',')                                                         |
+-----------------------------------------------------------------------------------------------------------------------------------+
| SUM(IF(cource='语文',score,0)) AS 语文,                                                                                           |
| SUM(IF(cource='语文',score,0)) AS 语文,SUM(IF(cource='数学',score,0)) AS 数学,                                                    |
| SUM(IF(cource='语文',score,0)) AS 语文,SUM(IF(cource='数学',score,0)) AS 数学,SUM(IF(cource='物理',score,0)) AS 物理,             |
+-----------------------------------------------------------------------------------------------------------------------------------+
3 ROWS IN SET (0.00 sec)

mysql> SET @a=CONCAT(@a,"ROUND(AVG(score) ,2) AS \"平均成绩\"");
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SET @b=CONCAT('SELECT IFNULL(cname,\'总成绩\'),',LEFT(@a,LENGTH(@a)-1),' ,SUM(score) AS \"总成绩\" FROM tb GROUP BY cname ');
QUERY OK, 0 ROWS affected (0.00 sec)

mysql>
mysql> /*班级成员总计部分**/
mysql> SET @a2="";
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SET @b2=CONCAT('SELECT "all",IFNULL(cname,\'总成绩\'),',LEFT(@a,LENGTH(@a)-1),' ,SUM(score) AS \"总成绩\" FROM tb GROUP BY cname ');
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SELECT @a2:=CONCAT(@a2,'ROUND(AVG(`',cource,'`),2),') FROM (SELECT DISTINCT cource FROM tb) A;
+-----------------------------------------------------------------------+
| @a2:=CONCAT(@a2,'ROUND(AVG(`',cource,'`),2),')                        |
+-----------------------------------------------------------------------+
| ROUND(AVG(`语文`),2),                                                 |
| ROUND(AVG(`语文`),2),ROUND(AVG(`数学`),2),                            |
| ROUND(AVG(`语文`),2),ROUND(AVG(`数学`),2),ROUND(AVG(`物理`),2),       |
+-----------------------------------------------------------------------+
3 ROWS IN SET (0.00 sec)

mysql> SET @a2=CONCAT(@a2," ROUND(AVG(`平均成绩`),2),ROUND(AVG(`总成绩`),2) ");
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SET @c=CONCAT("SELECT \"班级平均数\",",LEFT(@a2,LENGTH(@a)-1)," FROM(",@b2,")tb2 GROUP BY tb2.all;");
QUERY OK, 0 ROWS affected (0.00 sec)

mysql> SET @d=CONCAT(@b," UNION ALL ",@c);
QUERY OK, 0 ROWS affected (0.00 sec)

mysql>
mysql> PREPARE stmt1 FROM @d;
QUERY OK, 0 ROWS affected (0.00 sec)
Statement prepared

mysql> EXECUTE stmt1;
+---------------------------+--------+--------+--------+--------------+-----------+
| IFNULL(cname,'总成绩')    | 语文   | 数学   | 物理   | 平均成绩     | 总成绩    |
+---------------------------+--------+--------+--------+--------------+-----------+
| 张三                      |  74.00 |  83.00 |  93.00 |        83.33 |    250.00 |
| 李四                      |  74.00 |  84.00 |  94.00 |        84.00 |    252.00 |
| 班级平均数                |  74.00 |  83.50 |  93.50 |        83.67 |    251.00 |
+---------------------------+--------+--------+--------+--------------+-----------+
3 ROWS IN SET (0.00 sec)

mysql>
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