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Adds practice problems for sql primer.

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Tanmay 2022-09-17 15:50:17 +01:00
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@ -213,3 +213,10 @@ This can be achieved by using the following SQL query:
```sql ```sql
SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches b ON s.batch_id = b.id; SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches b ON s.batch_id = b.id;
``` ```
## Practice questions
* [Find customer reference](https://leetcode.com/problems/find-customer-referee/)
* [Big countries](https://leetcode.com/problems/big-countries/)
* [Not Boring Movies](https://leetcode.com/problems/not-boring-movies/)
* [Article Views](https://leetcode.com/problems/article-views-i/)
* [Patients with a condition](https://leetcode.com/problems/patients-with-a-condition/)