void setSalesAmount(double a) { sales_amount = a; } void setCommissionRate(double r) { commission_rate = r; }解释

这是两个函数的定义，用于设置销售额和佣金率的值：

- `setSalesAmount(double a)`: 将输入的参数 `a` 赋值给 `sales_amount`，即设置销售额。
- `setCommissionRate(double r)`: 将输入的参数 `r` 赋值给 `commission_rate`，即设置佣金率。

这两个函数可能是某个销售系统中的一部分，用于设置每个销售员的销售额和佣金率。

相关问题

SELECT a.supplier_id, count(DISTINCT a.order_id) AS totalcount, sum(IFNULL(b.receipt_amount, 0)) / 100 as total_amount, sum(IFNULL(b.sell_commission, 0)) / 100 as total_sellcommAmount, count(DISTINCT IF(b.channel_code = 61, a.order_id, NULL)) AS channelcode61_count, sum( IF(b.channel_code = 61, IFNULL(b.receipt_amount, 0), 0) ) / 100 as channelcode61_amount, sum( IF(b.channel_code = 61, IFNULL(b.sell_commission, 0), 0) ) / 100 as channelcode61_sellcommAmount FROM settle_order a INNER JOIN settle_order_receipt b ON a.order_id = b.order_id WHERE a.is_del = 0 AND a.order_type IN (70, 75) AND a.order_time >= '2023-05-28 00:00:00' AND a.order_time < '2023-05-29 00:00:00' AND a.supplier_id in ( 78, 63, 58, 57, 64, 72, 71, 74, 83, 77, 70, 69, 67, 82, 65, 87, 73, 59, 66, 60, 86, 85, 79, 80, 84, 90 ) GROUP BY a.supplier_id order by a.supplier_id asc

感谢提供SQL语句。根据该SQL语句，可能可以通过以下几个方面进行优化：

1. 调整JOIN关系

可以尝试调整JOIN关系，优先选择小表作为驱动表（即在ON子句中使用小表的主键进行连接）。此外，如果可能，也可以考虑使用子查询或LEFT JOIN代替INNER JOIN。

2. 减少子查询

可以尝试使用JOIN或LEFT JOIN来代替子查询，以避免多次查询数据库。

3. 避免使用函数

在SELECT语句中使用函数会增加查询的开销，因此应尽量避免使用函数。如果可以，可以考虑在代码中使用变量进行计算。

4. 使用索引

可以根据查询条件设置索引，以加快查询速度。例如，在该SQL中可以设置a.is_del、a.order_type、a.order_time和a.supplier_id的索引。

综上，以下是一个可能的优化SQL示例：

SELECT
  a.supplier_id,
  COUNT(DISTINCT a.order_id) AS totalcount,
  SUM(IFNULL(b.receipt_amount, 0)) / 100 AS total_amount,
  SUM(IFNULL(b.sell_commission, 0)) / 100 AS total_sellcommAmount,
  COUNT(DISTINCT IF(b.channel_code = 61, a.order_id, NULL)) AS channelcode61_count,
  SUM(IF(b.channel_code = 61, IFNULL(b.receipt_amount, 0), 0)) / 100 AS channelcode61_amount,
  SUM(IF(b.channel_code = 61, IFNULL(b.sell_commission, 0), 0)) / 100 AS channelcode61_sellcommAmount
FROM
  (SELECT * FROM settle_order WHERE is_del = 0 AND order_type IN (70, 75) AND order_time >= '2023-05-28 00:00:00' AND order_time < '2023-05-29 00:00:00' AND supplier_id IN (78, 63, 58, 57, 64, 72, 71, 74, 83, 77, 70, 69, 67, 82, 65, 87, 73, 59, 66, 60, 86, 85, 79, 80, 84, 90)) a
  LEFT JOIN (SELECT * FROM settle_order_receipt) b ON a.order_id = b.order_id
GROUP BY
  a.supplier_id
ORDER BY
  a.supplier_id ASC

需要注意的是，优化SQL语句需要结合具体的数据库环境和数据情况进行，以上只是一个可能的示例，具体优化效果需要测试验证。

修改 错误 SELECT pr.PRODUCT_ID, pr.PRODUCT_NAME, pr.ORIGINAL_PRICE, pr.ONLINE_PRICE, pr.COMMISSION_PERCENT, pr.TOTAL_SALES, pr.SHOP, dict.label AS COMMERCE_TYPE_LABEL, pr.SERVICE_RATE, ord.ORDER_ID, date.label AS SEND_FLG_LABEL, pro.CONNECT_BUSINESS_FLG, address.APPLY_REMARK, address.CREATE_TIME, users.nicknameFROM t_product AS prLEFT JOIN t_order AS ord ON ord.PRODUCT_ID = pr.IDLEFT JOIN ( SELECT label, `value` FROM system_dict_data WHERE dict_type = 'COMMERCE_TYPE' ) AS dict ON dict.`value` = pr.COMMERCE_TYPE LEFT JOIN ( SELECT label, `value` FROM system_dict_data WHERE dict_type = 'trade_after_sample_type' ) AS date ON date.`value` = ord.SEND_FLGLEFT JOIN t_apply_pro AS pro ON pro.PRODUCT_ID = pr.IDLEFT JOIN t_apply_pro_user_address AS address ON address.t_apply_pro_id = pro.IDLEFT JOIN system_users AS users ON users.id = pro.OPERATE_USER_ID WHERE users.id = '1'

以下是修改后的SQL语句，主要是为了使语句更加易读和易懂：

SELECT 
    pr.PRODUCT_ID, 
    pr.PRODUCT_NAME, 
    pr.ORIGINAL_PRICE, 
    pr.ONLINE_PRICE, 
    pr.COMMISSION_PERCENT, 
    pr.TOTAL_SALES, 
    pr.SHOP, 
    dict.label AS COMMERCE_TYPE_LABEL, 
    pr.SERVICE_RATE, 
    ord.ORDER_ID, 
    date.label AS SEND_FLG_LABEL, 
    pro.CONNECT_BUSINESS_FLG, 
    address.APPLY_REMARK, 
    address.CREATE_TIME, 
    users.nickname
FROM 
    t_product pr
    LEFT JOIN t_order ord ON ord.PRODUCT_ID = pr.ID
    LEFT JOIN (
        SELECT label, `value` 
        FROM system_dict_data 
        WHERE dict_type = 'COMMERCE_TYPE'
    ) AS dict ON dict.`value` = pr.COMMERCE_TYPE 
    LEFT JOIN (
        SELECT label, `value` 
        FROM system_dict_data 
        WHERE dict_type = 'trade_after_sample_type'
    ) AS date ON date.`value` = ord.SEND_FLG
    LEFT JOIN t_apply_pro pro ON pro.PRODUCT_ID = pr.ID
    LEFT JOIN t_apply_pro_user_address address ON address.t_apply_pro_id = pro.ID
    LEFT JOIN system_users users ON users.id = pro.OPERATE_USER_ID 
WHERE 
    users.id = '1'

修改后的SQL语句对语句进行了格式化和缩进，使得语句更加易读和易懂。同时，还对表名和字段名进行了简化，以减少语句的长度，使其更加简洁。