What are some good SQL practice exercises for beginners?

What are some good SQL practice exercises for beginners?

Here are a few SQL practice exercises you can try:

1. Create a database and a table.
2. Insert data into the table.
3. Write a query to select all records from the table.
4. Update a record in the table.
5. Delete a record from the table.

Can you give me an example of a query to select specific columns?

Sure! If you have a table named 'employees', you can use:

SELECT first_name, last_name FROM employees;

This will select only the first and last names of all employees.

What about joining two tables?

To join two tables, you can use the following query:

SELECT employees.first_name, departments.department_name 
FROM employees 
JOIN departments ON employees.department_id = departments.id;

This will give you a list of employees along with their department names.

Are there any online platforms where I can practice these exercises?

Yes! Websites like LeetCode, HackerRank, and SQLZoo offer interactive SQL exercises and challenges.