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|1350|[Students With Invalid Departments](https://leetcode.com/problems/students-with-invalid-departments/)|[Solution](../master/database/_1350.sql)|| Easy|
|1327|[List the Products Ordered in a Period](https://leetcode.com/problems/list-the-products-ordered-in-a-period/)|[Solution](../master/database/_1327.sql)|| Easy|
--The table has information about the id of each department of a university.
13
+
--
14
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--
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--Table: Students
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--
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--+---------------+---------+
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--| Column Name | Type |
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--+---------------+---------+
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--| id | int |
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--| name | varchar |
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--| department_id | int |
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--+---------------+---------+
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--id is the primary key of this table.
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--The table has information about the id of each student at a university and the id of the department he/she studies at.
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--
27
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--
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--Write an SQL query to find the id and the name of all students who are enrolled in departments that no longer exists.
29
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--
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--Return the result table in any order.
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--
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--The query result format is in the following example:
33
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--
34
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--Departments table:
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--+------+--------------------------+
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--| id | name |
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--+------+--------------------------+
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--| 1 | Electrical Engineering |
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--| 7 | Computer Engineering |
40
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--| 13 | Bussiness Administration |
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--+------+--------------------------+
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--
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--Students table:
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--+------+----------+---------------+
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--| id | name | department_id |
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--+------+----------+---------------+
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--| 23 | Alice | 1 |
48
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--| 1 | Bob | 7 |
49
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--| 5 | Jennifer | 13 |
50
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--| 2 | John | 14 |
51
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--| 4 | Jasmine | 77 |
52
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--| 3 | Steve | 74 |
53
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--| 6 | Luis | 1 |
54
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--| 8 | Jonathan | 7 |
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--| 7 | Daiana | 33 |
56
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--| 11 | Madelynn | 1 |
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--+------+----------+---------------+
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--
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--Result table:
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--+------+----------+
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--| id | name |
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--+------+----------+
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--| 2 | John |
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--| 7 | Daiana |
65
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--| 4 | Jasmine |
66
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--| 3 | Steve |
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--+------+----------+
68
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--
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--John, Daiana, Steve and Jasmine are enrolled in departments 14, 33, 74 and 77 respectively. department 14, 33, 74 and 77 doesn't exist in the Departments table.