MariaDB10.2.X-新特性1-支持分析函数

前言：前段时间看到MariaDB10.2出测试版本了，心想有什么新特性玩玩，大家都知道MySQL不支持分析函数，但是MariaDB10.2.X支持分析函数了，

1.表结构

CREATE TABLE `t1` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`userId` varchar(30) NOT NULL COMMENT '用户ID',

`orderId` varchar(60) NOT NULL DEFAULT '' COMMENT '订单ID',

`channerId` varchar(60) NOT NULL DEFAULT '' COMMENT '充值渠道',

`amount` int(11) DEFAULT NULL COMMENT '充值金额',

PRIMARY KEY (`id`),

KEY `idx_userid` (`userId`),

KEY `idx_channerId` (`channerId`)

) ENGINE=InnoDB  DEFAULT CHARSET=utf8

2.插入测试数据

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060101','支付宝',100);

insert into t1 (userId, orderId, channerId, amount) values('李4','2016060102','支付宝',98);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060103','易票联',60);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060104','银联',120);

insert into t1 (userId, orderId, channerId, amount) values('王5','2016060105','微信',170);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060106','微信',40);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060107','支付宝',200);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060108','易支付',10);

insert into t1 (userId, orderId, channerId, amount) values('张3','2016060109','微信','80);

insert into t1 (userId, orderId, channerId, amount) values('李4','2016060110','支付宝',300);

insert into t1 (userId, orderId, channerId, amount) values('李4','2016060111','银联',40);

insert into t1 (userId, orderId, channerId, amount) values('李4','2016060112','钱包',72);

insert into t1 (userId, orderId, channerId, amount) values('赵6','2016060113','闪付',20);

insert into t1 (userId, orderId, channerId, amount) values('田7','2016060114','钱包',80);

insert into t1 (userId, orderId, channerId, amount) values('刘1','2016060115','微信',60);

insert into t1 (userId, orderId, channerId, amount) values('哈2','2016060116','易支付',82);

3.查询每个充值渠道的总金额

MariaDB [test11]> select channerId,sum(amount) over(partition by channerId) from t1;

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

| channerId | sum(amount) over(partition by channerId) |

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

| 支付宝    |                                      698 |

| 支付宝    |                                      698 |

| 易票联    |                                       60 |

| 银联      |                                      160 |

| 微信      |                                      350 |

| 微信      |                                      350 |

| 支付宝    |                                      698 |

| 易支付    |                                       92 |

| 微信      |                                      350 |

| 支付宝    |                                      698 |

| 银联      |                                      160 |

| 钱包      |                                      152 |

| 闪付      |                                       20 |

| 钱包      |                                      152 |

| 微信      |                                      350 |

| 易支付    |                                       92 |

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

16 rows in set (0.02 sec)

MariaDB [test11]> select * from (

-> select channerId,sum(amount) over(partition by channerId) from t1) a

->  GROUP BY channerId;

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

| channerId | sum(amount) over(partition by channerId) |

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

| 微信      |                                      350 |

| 支付宝    |                                      698 |

| 易支付    |                                       92 |

| 易票联    |                                       60 |

| 钱包      |                                      152 |

| 银联      |                                      160 |

| 闪付      |                                       20 |

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

7 rows in set (0.02 sec)

4.查询每个渠道平均充值金额

MariaDB [test11]> select channerId,avg(amount) over(partition by channerId) from t1

-> ;

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

| channerId | avg(amount) over(partition by channerId) |

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

| 支付宝    |                                 174.5000 |

| 支付宝    |                                 174.5000 |

| 易票联    |                                  60.0000 |

| 银联      |                                  80.0000 |

| 微信      |                                  87.5000 |

| 微信      |                                  87.5000 |

| 支付宝    |                                 174.5000 |

| 易支付    |                                  46.0000 |

| 微信      |                                  87.5000 |

| 支付宝    |                                 174.5000 |

| 银联      |                                  80.0000 |

| 钱包      |                                  76.0000 |

| 闪付      |                                  20.0000 |

| 钱包      |                                  76.0000 |

| 微信      |                                  87.5000 |

| 易支付    |                                  46.0000 |

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

16 rows in set (0.01 sec)

MariaDB [test11]> select * from (

-> select channerId,avg(amount) over(partition by channerId) from t1) a

-> GROUP BY channerId;

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

| channerId | avg(amount) over(partition by channerId) |

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

| 微信      |                                  87.5000 |

| 支付宝    |                                 174.5000 |

| 易支付    |                                  46.0000 |

| 易票联    |                                  60.0000 |

| 钱包      |                                  76.0000 |

| 银联      |                                  80.0000 |

| 闪付      |                                  20.0000 |

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

7 rows in set (0.00 sec)

5.查询每个渠道最小充值金额

MariaDB [test11]> select * from ( select channerId,min(amount) over(partition by channerId) from t1) a   GROUP BY channerId;

ERROR 1235 (42000): This version of MariaDB doesn't yet support 'This aggregate as window function'

可惜不支持

6.查询每个驱动最大充值金额

MariaDB [test11]> select * from ( select channerId,max(amount) over(partition by channerId) from t1) a   GROUP BY channerId;

ERROR 1235 (42000): This version of MariaDB doesn't yet support 'This aggregate as window function'

MariaDB [test11]>

聪明的你，一下子猜测到不支持

#7.根据每个充值渠道，根据充值金额排名

MariaDB [test11]> SELECT RANK() OVER (PARTITION BY channerId ORDER BY amount desc ) AS rank,     DENSE_RANK() OVER (PARTITION BY channerId ORDER BY amount desc ) AS dense_rank,     ROW_NUMBER() OVER (PARTITION BY channerId ORDER BY amount desc) AS row_num, userId,channerId,amount    from t1 ;

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

| rank | dense_rank | row_num | userId | channerId | amount |

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

|    3 |          3 |       3 | 张3    | 支付宝    |    100 |

|    4 |          4 |       4 | 李4    | 支付宝    |     98 |

|    1 |          1 |       1 | 张3    | 易票联    |     60 |

|    1 |          1 |       1 | 张3    | 银联      |    120 |

|    1 |          1 |       1 | 王5    | 微信      |    170 |

|    4 |          4 |       4 | 张3    | 微信      |     40 |

|    2 |          2 |       2 | 张3    | 支付宝    |    200 |

|    2 |          2 |       2 | 张3    | 易支付    |     10 |

|    2 |          2 |       2 | 张3    | 微信      |     80 |

|    1 |          1 |       1 | 李4    | 支付宝    |    300 |

|    2 |          2 |       2 | 李4    | 银联      |     40 |

|    2 |          2 |       2 | 李4    | 钱包      |     72 |

|    1 |          1 |       1 | 赵6    | 闪付      |     20 |

|    1 |          1 |       1 | 田7    | 钱包      |     80 |

|    3 |          3 |       3 | 刘1    | 微信      |     60 |

|    1 |          1 |       1 | 哈2    | 易支付    |     82 |

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

16 rows in set (0.00 sec)

#排个序，这样就好看多了，每个渠道充值排名

MariaDB [test11]> SELECT RANK() OVER (PARTITION BY channerId ORDER BY amount desc ) AS rank,     DENSE_RANK() OVER (PARTITION BY channerId ORDER BY amount desc ) AS dense_rank,     ROW_NUMBER() OVER (PARTITION BY channerId ORDER BY amount desc) AS row_num, userId,channerId,amount    from t1 order by 5,1;

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

| rank | dense_rank | row_num | userId | channerId | amount |

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

|    1 |          1 |       1 | 王5    | 微信      |    170 |

|    2 |          2 |       2 | 张3    | 微信      |     80 |

|    3 |          3 |       3 | 刘1    | 微信      |     60 |

|    4 |          4 |       4 | 张3    | 微信      |     40 |

|    1 |          1 |       1 | 李4    | 支付宝    |    300 |

|    2 |          2 |       2 | 张3    | 支付宝    |    200 |

|    3 |          3 |       3 | 张3    | 支付宝    |    100 |

|    4 |          4 |       4 | 李4    | 支付宝    |     98 |

|    1 |          1 |       1 | 哈2    | 易支付    |     82 |

|    2 |          2 |       2 | 张3    | 易支付    |     10 |

|    1 |          1 |       1 | 张3    | 易票联    |     60 |

|    1 |          1 |       1 | 田7    | 钱包      |     80 |

|    2 |          2 |       2 | 李4    | 钱包      |     72 |

|    1 |          1 |       1 | 张3    | 银联      |    120 |

|    2 |          2 |       2 | 李4    | 银联      |     40 |

|    1 |          1 |       1 | 赵6    | 闪付      |     20 |

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

16 rows in set (0.01 sec)

MariaDB [test11]>

小结

跟Oracle,PostgreSQL, SQL SERVER还是有差距，不过已经很不错了。希望官方版本也引进这个新特性