Junior — Middle
Can you explain what the use of INNER JOIN in SQL queries means?
sobes.tech AI
Answer from AI
INNER JOIN in SQL is used to combine rows from two or more tables based on a matching condition of values in related columns.
When performing an INNER JOIN, only records that have matching values in both tables are returned.
For example, if there is an Orders table with orders and a Customers table with customers, the query:
SELECT Orders.OrderID, Customers.CustomerName
FROM Orders
INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID;
will return a list of orders with customer names, but only for those orders that have a corresponding customer in the Customers table.
Thus, INNER JOIN allows linking data from different tables based on a common attribute, excluding records without matches.