Removing table

src/data/courses/sql/chapters/data-definition-language/lessons/removing-table-data.md

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+---
+title: Removing Table Data
+description: Practice removing table data using DELETE and TRUNCATE statements
+order: 360
+type: challenge
+setup: |
+  ```sql
+  CREATE TABLE products (
+    id SERIAL PRIMARY KEY,
+    product_name VARCHAR(100),
+    description TEXT,
+    price DECIMAL(10,2),
+    stock_quantity INTEGER,
+    last_updated TIMESTAMP
+  );
+
+  INSERT INTO products (product_name, price, stock_quantity, last_updated) VALUES
+    ('Product A', 10.00, 100, '2024-01-01'),
+    ('Product B', 20.00, 200, '2024-01-02'),
+    ('Product C', 30.00, 300, '2024-01-03');
+  ```
+---
+
+I have created a table called `products` with the following columns:
+
+| Column         | Type          | Constraints                 |
+| -------------- | ------------- | --------------------------- |
+| id             | SERIAL        | PRIMARY KEY                 |
+| product_name   | VARCHAR(100)  |                             |
+| price          | DECIMAL(10,2) | CHECK (price > 0)           |
+| stock_quantity | INTEGER       | CHECK (stock_quantity >= 0) |
+| last_updated   | TIMESTAMP     |                             |
+
+Note that the `id` column is set to `SERIAL`, which means it will automatically generate a unique value for each new row.
+
+I have also inserted some dummy data into the table:
+
+| id  | product_name | price | stock_quantity | last_updated |
+| --- | ------------ | ----- | -------------- | ------------ |
+| 1   | Product A    | 10.00 | 100            | 2024-01-01   |
+| 2   | Product B    | 20.00 | 200            | 2024-01-02   |
+| 3   | Product C    | 30.00 | 300            | 2024-01-03   |
+
+You are required to remove all the data from the `products` table.
+
+## Solution
+
+```sql
+TRUNCATE TABLE products;
+```