Question

我一直在尝试执行以下查询，但它没有给我任何输出。

self.db.execute("SELECT * FROM patients WHERE patients.doctorid = (SELECT id FROM doctors WHERE username = '%s' % (usr)), callback=self.add_response)

我试图通过硬编码来执行相同的查询，它给了我正确的输出。

select * from patients where patients.doctorid = (select id from doctors where username = 'admin');

有人能说出错误吗？

Answer 1

尝试像这样执行：

 self.db.execute("SELECT * FROM patients WHERE patients.doctorid = (SELECT id FROM doctors WHERE username = '%s')" % (usr), callback=self.add_response)

我用"关闭了SQL查询并修正了括号。

您也可以按照here所示尝试：

self.db.execute("SELECT * FROM patients WHERE patients.doctorid = (SELECT id FROM doctors WHERE username = '%s';", (usr), callback=self.add_response)

两个SELECT语句NESTED

1 个答案: