Question

早上好，我正在尝试在MySQL中执行以下查询：显示未参与任何＆＃34; Juan Perez＆＃34;的顾问的姓名和姓氏。项目。我使用以下查询：

df = pd.DataFrame({'STATUS': [['REQUESTED', 'RECEIVED'], ['XYZ'], ['RECEIVED']]},
                  index=[1, 2, 3])
df.STATUS.apply(lambda x : 'RECEIVED' in x)
Out[11]: 
1     True
2    False
3     True
Name: STATUS, dtype: bool

但是当我执行查询时，它只隐藏那些与表中直接相关的查询。我如何隐藏顾问出现的其他记录，以便它们不出现？

感谢。

Answer 1

我认为如果在加入客户端的条件下，你可以在那里排除客户名称它会返回你想要的东西。

SELECT consultant.name, consultant.surname 
FROM consultor
INNER JOIN participate ON participate.id_consultant = consultant.id
INNER JOIN project ON  project.id = participate.id_project
INNER JOIN client ON  client.id = project.id_client and client.name NOT IN ("Juan Perez");

Answer 2

我设法通过以下方式解决它。感谢大家的帮助。

SELECT consultant.name, consultant.surname FROM consultant 
LEFT JOIN (
           SELECT id_project, participate.id_consultant FROM participate 
           INNER JOIN project 
           USING(id_project) 
           INNER JOIN client ON client.id = project.id_cliente 
                 WHERE client.name like 'Juan Perez'
          )
project ON project.id_consultant = consultant.id 
        WHERE project.id_project IS NULL;

不给出条件的任何记录（SQL）

2 个答案: