想使用一个查询从两个表中删除数据[关闭]

Question

问题：

有两个名为“EMPLOYEE”和“SALARY”的表具有以下字段：

EMPLOYEE: 
ID (int), 
EmployeeCode (varchar(50)), 
Name (varchar(50)), 
City (varchar(50))

SALARY: 
EmployeeCode (varchar(50)), 
Amount(int)

删除所有来自“DELHI”的员工及其工资。 我想在一个查询中同时删除两个表。

解决方案：

DELETE Employee, Salary FROM Employee e
JOIN Salary s ON s.EmployeeCode= e.EmployeeCode
WHERE  City ='Delhi';

Answer 1

不可能同时从两个表中删除，这应该可行

BEGIN TRAN

DELETE s FROM Salary s
JOIN Employee e ON s.EmployeeCode= e.EmployeeCode
WHERE  e.City ='Delhi';

DELETE e FROM Employee e
WHERE  e.City ='Delhi';

COMMIT TRAN

Answer 2

DELETE e 
FROM Employee e 
    JOIN Salary s ON (s.EmployeeCode= e.EmployeeCode) 
WHERE City ='Delhi';

DELETE s 
FROM Salary s LEFT JOIN Employee e 
    ON (s.EmployeeCode= e.EmployeeCode AND e.City ='Delhi') 
WHERE e.EmployeeCode IS NULL