Update challenge names

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

@@ -1,55 +0,0 @@
----
-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/data-definition-language/lessons/table-creation.md

@@ -0,0 +1,32 @@
+---
+title: Table Creation
+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 required to create 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          | VARCHAR(250)   | NOT NULL          |
+| author         | VARCHAR(250)   | NOT NULL          |
+| genre          | VARCHAR(250)   |                   |
+| price          | DECIMAL(10, 2) | CHECK (price > 0) |
+| published_date | DATE           |                   |
+
+Table should have following constraints in place:
+
+- The `id` column should uniquely identify each book.
+- The `title` and `author` columns cannot be `NULL`.
+- The `price` column must be greater than `0`.
+
+## Expected Output
+
+After executing the query, there should be no errors and the table should be created successfully.

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

@@ -1,5 +1,5 @@
 ---
-title: Expression Projection
+title: Select Expression
 description: Write a SQL query to find the total number of orders in the `orders` table.
 order: 310
 type: challenge

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

@@ -1,5 +1,5 @@
 ---
-title: Unique Projection
+title: Select Unique
 description: Write a SQL query to find the total number of orders in the `orders` table.
 order: 330
 type: challenge