数据报表统计实现

一：背景

二：实现过程

一：背景

最近需要开发一个数据统计的功能，主要是按照各种维度统计客户的数据，一般是按照日期来展示数量和变化情况。下面我们来梳理下实现的过程。

二：实现过程

1：梳理涉及统计的表

首先我们梳理涉及的统计表。我们可以根据需求来梳理，假定需求是以登录员工为例统计该员工下的客户信息，假如功能是员工持有的客户数量，员工持有的下单客户数量，员工持有的认证客户数量，员工持有的客户下单总金额等，这里涉及客户表和订单表

2：确定统计计算方法

我们已经确定涉及的表是客户表和订单表，要计算登录员工的客户信息和下单信息。可以确定我们需要输出持有客户数量，下单客户数量，认证客户数量，下单客户总金额

我们按照每个数量逐一计算：

客户数量:

select count(*) as total_num from customer where user_id=1

这里的客户数量，也可以根据员工名字或者时间进行搜索

select count(*) as total_num from customer where user_id=1 or user_name = '小' and create_time between '2024-05-06' and '2024-06-06'

下单客户数量：

select count(*) as order_num from customer where user_id=1 and customer_id in (select distinct user_id from order);

认证客户数量：

select count(*) as total_num from customer where user_id=1 and status = 1;

下单客户总金额:

select sum(order_amount) as amount from sorder where user_id in (select customer_id from customer where user_id=1 )

上面我们已经实现了每个数量的统计，那么如何合并四个数量到一个sql中呢，可以使用union all

SELECT
   sum(a.total_num) AS total_num,
   sum(a.order_num) AS order_num,
   sum(a.auth_num) AS auth_num,
   sum(a.amount) AS amount
FROM
   (
   SELECT
       count(*) as total_num,
       0 as order_num,
       0 AS auth_num,
       0 AS amount
   FROM
       shrimp_crm_customer_new
   WHERE
       owner_user_id = 1 UNION ALL
   SELECT
       0 AS total_num,
       count(*) as order_num,
       0 AS auth_num,
       0 AS amount
   FROM
       shrimp_crm_customer_new
   WHERE
       owner_user_id = 1
       AND customer_id IN ( SELECT DISTINCT uid FROM shrimp_shop_order )
   UNION ALL
   SELECT
       0 AS total_num,
       0 AS order_num,
       count(*) AS auth_num,
       0 AS amount
   FROM
       shrimp_crm_customer_new
   WHERE
       owner_user_id = 1
       AND STATUS = 1 UNION ALL
   SELECT
       0 AS total_num,
       0 AS order_num,
       0 AS auth_num,
       sum(order_amount ) AS amount
   FROM
       shrimp_shop_order
   WHERE
   uid IN ( SELECT customer_id FROM shrimp_crm_customer_new   WHERE owner_user_id = 1 )
   ) a