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

JSON stands for JavaScript Object Notation.

JSON supports six data types: booleans, numbers, strings, objects, arrays, and null.

JSON is supported natively in MySQL through a dedicated data type named `JSON`.

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

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

What is the result of the following statement?

```sql
SELECT JSON_ARRAY(0, JSON_ARRAY(), JSON_EXTRACT('{"a": 0}', '$.b'), JSON_OBJECT(1, 1, 1, 1, 2, 2));
```

What is the result of the following statement?
<pre><code class="language-sql">SELECT JSON_ARRAY(0, JSON_ARRAY(), JSON_EXTRACT('{&quot;a&quot;: 0}', '$.b'), JSON_OBJECT(1, 1, 1, 1, 2, 2));
</code></pre>

`SELECT JSON_EXTRACT(document, '$[0].a') FROM Foo;`

**(Select all that apply.)** We want to retrieve the value of the attribute `a` in the following JSON document. Which statements enable us to achieve this?

```sql
CREATE TEMPORARY TABLE Foo (
    document JSON
);
INSERT INTO Foo VALUE ('[{"b": 1, "a": 0}]');
```

(Select all that apply.) We want to retrieve the value of the attribute <code>a</code> in the following JSON document. Which statements enable us to achieve this?
<pre><code class="language-sql">CREATE TEMPORARY TABLE Foo (
 document JSON
);
INSERT INTO Foo VALUE ('[{&quot;b&quot;: 1, &quot;a&quot;: 0}]');
</code></pre>

What is the result of the following statement?

```sql
SET @a = '{"a": 0, "b": [2]}';
SET @b = '{"a": 1, "b": {"c": 3}}';

SELECT JSON_MERGE_PRESERVE(@a, @b);
```

What is the result of the following statement?
<pre><code class="language-sql">SET @a = '{&quot;a&quot;: 0, &quot;b&quot;: [2]}';
SET @b = '{&quot;a&quot;: 1, &quot;b&quot;: {&quot;c&quot;: 3}}';

SELECT JSON_MERGE_PRESERVE(@a, @b);
</code></pre>

`ModifyXML()` allows us to modify XML values in MySQL.

The XPath `/html/body/a` selects all `<a>` elements inside the `<body>` of the `<html>` tag.

`UpdateXML()` can be used to remove parts of an XML value.

Test your knowledge of JSON and XML 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: JSON and XML