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Adds sub-queries and functions.

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Tanmay
2022-07-22 14:34:01 +01:00
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@@ -8,6 +8,7 @@
| Transactions and Indexes | [1](notes/04-transactions-indexes.md) | [2](notes/04-transactions-indexes.pdf) | [3](notes/04-transactions-indexes-hw.pdf) | [4](mcqs/04-transactions-indexes.md) | _ | _ |
| SQL Primer | [1](notes/05-sql-primer.md) | [2](notes/05-sql-primer.pdf) | [3](notes/05-sql-primer-hw.pdf) | [4](mcqs/05-sql-primer.md) | [5](notes/05-sql-primer-worksheet.md) | [6](notes/05-sql-primer-worksheet-answers.md) |
| SQL Joins and Aggregation | [1](notes/06-sql-joins-aggregation.md) | [2](notes/06-sql-joins-aggregation.pdf) | [3](notes/06-sql-joins-aggregation-hw.pdf) | [4](mcqs/06-sql-joins-aggregation.md) | [5](notes/06-sql-joins-aggregation-worksheet.md) | [6](notes/06-sql-joins-aggregation-worksheet-answers.md) |
| Subqueries and Functions | [1](notes/07-subqueries-functions.md) | [2](notes/07-subqueries-functions.pdf) | [3](notes/07-subqueries-functions-hw.pdf) | [4](mcqs/07-subqueries-functions.md) | [5](notes/07-subqueries-functions-worksheet.md) | [6](notes/07-subqueries-functions-worksheet-answers.md) |
## Assignments
@@ -20,6 +21,21 @@ Download the ER diagram from [here](media/student-er.drawio) and import it into
* Add relationships between the `mentor` and `batch` entities. A mentor can be assigned to multiple batches and a batch can have multiple mentors.
### Problem sets
1. [**Simple - I**](https://leetcode.com/problems/big-countries/)
2. [Simple - II](https://leetcode.com/problems/find-customer-referee//)
3. [**Joins - I**](https://leetcode.com/problems/employees-earning-more-than-their-managers/)
4. [Joins - II](https://leetcode.com/problems/combine-two-tables/)
5. [**Aggregation - I**](https://leetcode.com/problems/duplicate-emails/)
6. [Join - III](https://leetcode.com/problems/delete-duplicate-emails/)
7. [Aggregation - II](https://leetcode.com/problems/customer-placing-the-largest-number-of-orders/)
8. [Aggregation - III](https://leetcode.com/problems/classes-more-than-5-students/)
9. [Subqueries - I](https://leetcode.com/problems/customers-who-never-order/)
10. [Subqueries - II](https://leetcode.com/problems/sales-person/)
11. [Dates - I](https://leetcode.com/problems/rising-temperature/)
Bold problems were solved during the session.
## RDBMS
* [MySQL](https://www.mysql.com/)
* [PostgreSQL](https://www.postgresql.org/)