Question

1）查询返回所有在3月销售额大于或等于20的座席，还返回3月大于或等于20的销售额和3月大于或等于20的销售额。结果排序为降序。冒号：名称，数量，数量

2）查询返回所有在3月一个月甚至没有一次销售额大于20的代理商。冒号：姓名

数据库：

DBSale

ID ____ IDAgent _____日期____金额

1 _______ 1 ______ 16-03-03 _____ 15

2 _______ 2 ______ 16-01-03 _____ 25

3 _______ 1 ______ 16-01-03 _____ 17

4 _______ 3 ______ 16 04-03 _____ 55

5 _______ 4 ______ 2016年4月3日_____ 12

6 _______ 5 ______ 16-05--03 _____ 13

7 _______ 5 ______ 16-06-03 _____ 11

8 _______ 4 ______ 16 11-03-16 _____ 20

9 _______ 4 ______ 16-12-03 _____ 21

10 ______ 3 ______ 16-03-03 _____ 45

11 ______ 2 ______ 16-03-03 _____ 45

12 ______ 1 ______ 16-03-03 _____ 11

13 ______ 1 ______ 16-03-03 _____ 19

14 ______ 1 ______ 2013年1月4日_____ 25

15 ______ 1 ______ 16 04-04-16 _____ 65

16 ______ 3 ______ 16 15-04-16 _____ 10

17 ______ 5 ______ 16-16-04- _____ 41

DBUser

ID ___名称

1 ___马克·罗斯伯格

2 ___唐·史密斯

3 ___ Anna Twix

4 ___ Angela Reeves

5 ___ Juan Dovitoso

这些是我不正确的尝试：

1）

SELECT u.name SUM(s.amount) AS amount, COUNT(s.amount) AS count
FROM dbuser AS u JOIN dbsale AS s
ON u.id = s.idagent
ORDER BY s.amount ASC
HAVING s.amount >= 20 AND MONTH(s.date)='3';

2）

SELECT DISTINCT u.name
FROM dbuser AS u INNER JOIN dbsale AS s
ON u.id = s.idagent
WHERE s.amount < 20 AND MONTH(s.date)='3' ;

Answer 1

您的查询1将是-

SELECT 
A.`name`, 
SUM(B.amount) AS amount, 
COUNT(B.amount) AS count 
FROM DBUser A
INNER JOIN DBSale B ON A.ID = B.IDAgent
WHERE MONTH(CAST(B.date AS DATE))=3
AND B.amount >= 20
GROUP BY A.`name`

查询2将是-

SELECT A.`name`
FROM DBUser A
INNER JOIN DBSale B 
ON A.ID = B.IDAgent
WHERE MONTH(CAST(B.date AS DATE))=3
GROUP BY A.`name`,A.ID
HAVING SUM(CASE WHEN B.Amount > 20 THEN 1 ELSE 0 END) > 0

根据您的要求添加订单。

SQL查询分配

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