MySQL：如何通过链接到其他两个表的两个外键插入到表中？

Question

I have the following db structure with 3 tables as an example:

Employee

• id // primary key, autoincrement
• employee_no // a varchar

Scenario

• id // primary key, autoincrement
• key // a varchar

Case

• id // primary key, auto-increment
• employee_id // foreign key to Employee table
• scenario_id // foreign key to Scenario table

Say I already have data in employee and scenario table and I want to insert a new case into the case table so that it fills the foreign keys during the insert. The new case has employee_no in employee table and key in scenario table. I will need to join the two tables using the above values to get employee id and scenario id.

This post ( Mysql: How to insert values in a table which has a foreign key ) showed how this can be done with one foreign key, how do I do the same thing with two foreign keys?

I currently have something like this that does not work:

INSERT INTO `case` (scenario_id, employee_id, employee_no)
SELECT 
(SELECT scenario.id FROM scenario WHERE scenario.`key` = 'UC01') as scenario_id,
(SELECT employee.id, employee.employee_no FROM employee WHERE employee.employee_no = "0001") as employee_id, employee_no

Answer 1

Join the two tables:

INSERT INTO case (scenario_id, employee_id)
SELECT s.id, e.id
FROM scenario AS s
CROSS JOIN emplopyee AS e
WHERE s.`key` = 'UC01'
AND e.employee_no = '0001'