What are SQL queries and how do they work?

What are SQL queries and how do they work?

SQL queries are commands used to communicate with a database. They allow you to retrieve, insert, update, or delete data.

Can you give me an example of a simple SQL query?

Sure! A simple SQL query to select all records from a table called 'employees' would be: SELECT * FROM employees;

What does the 'WHERE' clause do in SQL?

The 'WHERE' clause is used to filter records. It specifies conditions that must be met for the records to be selected.

How do I join two tables in SQL?

You can join two tables using the JOIN keyword. For example: SELECT * FROM table1 JOIN table2 ON table1.id = table2.id;