Learn advanced SQL, starting with SQL basics, data types, JSON/XML, and spatial data, and covering advanced techniques for dynamic and efficient database management.

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MySQL Server

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MySQL Server (with Timezones)

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Dive into MySQL, a powerful database system for developers handling complex data structures. Learning MySQL equips you with skills for diverse applications, from web development to advanced data analysis, enhancing your ability to manage and manipulate data efficiently.

This course starts with MySQL Shell basics, leading to exploring data types and mastery of SQL statements. You will learn about user-defined variables and table expressions and delve into JSON and XML data handling. The course also covers spatial data management and advanced techniques like recursive queries and window functions. Each module builds upon the last, ensuring a comprehensive understanding of MySQL’s capabilities.

After completing this course, you will have a solid grasp of MySQL and be ready to solve intricate data problems. This expertise opens doors to advanced database roles and opportunities, elevating your career in the tech industry.

Mastering Advanced SQL Techniques with MySQL

Recursion is a phenomenon where something is defined in terms of itself.

With recursion, any SQL query can be evaluated efficiently in $\mathcal{O}(r^c)$ with $r$ number of rows and $c$ columns of the referred table.

**(Select all that apply.)** Which statement(s) is *incorrect*? 

(Select all that apply.) Which statement(s) is incorrect?

Given the following SQL query, what is its output?

```sql
SELECT 1 AS `Number`
UNION
SELECT 2
UNION ALL
SELECT 2
UNION
SELECT 3;
```

Given the following SQL query, what is its output?
<pre><code class="language-sql">SELECT 1 AS `Number`
UNION
SELECT 2
UNION ALL
SELECT 2
UNION
SELECT 3;
</code></pre>

The given query outputs the numbers from 0 to 10, including.

The given query aborts with an error as it exceeds the default recursive depth of 1000.

The given query outputs the numbers from 0 to 10, excluding.

Given the following SQL query, which statement is *true*?

```sql
WITH RECURSIVE NumberSequence(n) AS (SELECT 0
 UNION ALL
 SELECT n
 FROM NumberSequence
 WHERE n < 10)
SELECT *
FROM NumberSequence;
```

Given the following SQL query, which statement is true?
<pre><code class="language-sql">WITH RECURSIVE NumberSequence(n) AS (SELECT 0
 UNION ALL
 SELECT n
 FROM NumberSequence
 WHERE n &lt; 10)
SELECT *
FROM NumberSequence;
</code></pre>

Employ the `SQL_NO_CACHE` directive in `SELECT` statements.

Restrict the query’s maximum recursion depth.

Analyze a query’s execution plan using `EXPLAIN ANALYZE`.

Restrict the query’s maximum execution time.

**(Select all that apply.)** Which measure(s) supports the performance optimization of a recursive CTE? 

(Select all that apply.) Which measure(s) supports the performance optimization of a recursive CTE?

**(Select all that apply.)** Which option below can *not* be used in the `SELECT` statement of a CTE’s recursive subquery in recent versions of MySQL? 

(Select all that apply.) Which option below can not be used in the <code>SELECT</code> statement of a CTE’s recursive subquery in recent versions of MySQL?

Test your knowledge of recursion in MySQL.

Getting Started

Data Types

SQL Statements

Flow Control Functions

String Functions

Date and Time Functions

Aggregate Functions

Window Functions

Recursion

JSON and XML

Spatial Data

Mastering Advanced SQL Techniques with MySQL

Conclusion

Quiz: Recursion