What are some examples of SQL queries?
An example of an AI chatbot conversation about SQL query examples and their usage.
Can you provide some examples of SQL queries?
Sure! Here are a few examples: 1. SELECT * FROM users; retrieves all users. 2. INSERT INTO orders (user_id, product_id) VALUES (1, 2); adds a new order.
What does the JOIN clause do in SQL?
The JOIN clause is used to combine rows from two or more tables based on a related column. For example, SELECT users.name, orders.product FROM users JOIN orders ON users.id = orders.user_id;.
Can you explain the difference between INNER JOIN and LEFT JOIN?
Yes! An INNER JOIN returns only the rows with matching values in both tables, while a LEFT JOIN returns all rows from the left table and matched rows from the right table, filling with NULLs where there are no matches.
What is a subquery?
A subquery is a query nested inside another query. It can be used in SELECT, INSERT, UPDATE, or DELETE statements to provide a value or set of values.
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