Improve challenges in SQL basics

src/data/courses/sql/chapters/data-definition-language/lessons/challenge-1.md

@@ -0,0 +1,55 @@
+---
+title: Challenge 1
+description: Write a SQL query to create a `books` table with specific columns.
+order: 300
+type: challenge
+initSteps: []
+expectedResults:
+  - columns: [message]
+    values:
+      - ['Table created successfully']
+---
+
+You are tasked with creating a table named `books` for a bookstore database. The table should have the following columns:
+
+| Column Name    | Data Type      | Constraints       |
+| -------------- | -------------- | ----------------- |
+| id             | INTEGER        | PRIMARY KEY       |
+| title          | TEXT           | NOT NULL          |
+| author         | TEXT           | NOT NULL          |
+| genre          | TEXT           |                   |
+| price          | NUMERIC(10, 2) | CHECK (price > 0) |
+| published_date | DATE           |                   |
+
+### Requirements
+
+1. The `id` column should uniquely identify each book.
+2. The `title` and `author` columns cannot be null.
+3. The `price` column must be greater than 0.
+
+### Task
+
+Write a SQL query to create the `books` table as described above.
+
+### Expected Output
+
+After running your query, the output should confirm the creation of the table:
+
+| message                    |
+| -------------------------- |
+| Table created successfully |
+
+### Example Query (Partial)
+
+```sql
+CREATE TABLE books (
+  id INTEGER PRIMARY KEY,
+  title TEXT NOT NULL,
+  author TEXT NOT NULL,
+  genre TEXT,
+  price NUMERIC(10, 2) CHECK (price > 0),
+  published_date DATE
+);
+```
+
+Now, complete the challenge and create the table!

src/data/courses/sql/chapters/sql-basics/lessons/expression-projection.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 2
+title: Expression Projection
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 300
+order: 310
 type: challenge
 initSteps:
   - CREATE TABLE books (

src/data/courses/sql/chapters/sql-basics/lessons/logical-operators.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 4
+title: Logical Operators
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 400
+order: 340
 type: challenge
 initSteps:
   - CREATE TABLE books (

src/data/courses/sql/chapters/sql-basics/lessons/projection-challenge.md

@@ -1,5 +1,5 @@
 ---
-title: Challenge 1
+title: Projection Challenge
 description: Write a SQL query to find the total number of orders in the `orders` table.
 order: 300
 type: challenge

src/data/courses/sql/chapters/sql-basics/lessons/sorting-and-filtering.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 7
+title: Sorting and Filtering
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 700
+order: 370
 type: challenge
 initSteps:
   - CREATE TABLE orders (

src/data/courses/sql/chapters/sql-basics/lessons/sorting-and-limiting.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 6
+title: Sorting and Limiting
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 600
+order: 360
 type: challenge
 initSteps:
   - CREATE TABLE orders (

src/data/courses/sql/chapters/sql-basics/lessons/sorting-challenge.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 5
+title: Sorting Challenge
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 500
+order: 350
 type: challenge
 initSteps:
   - CREATE TABLE books (

src/data/courses/sql/chapters/sql-basics/lessons/unique-projection.md

@@ -1,7 +1,7 @@
 ---
-title: Challenge 3
+title: Unique Projection
 description: Write a SQL query to find the total number of orders in the `orders` table.
-order: 300
+order: 330
 type: challenge
 initSteps:
   - CREATE TABLE orders (