Question

Name the type of join used to combine rows from two tables based on a related column between them.

Hint:

\textbf{Remember:} Matching rows from both tables → INNER JOIN.

Answer 1

Type of Join Used to Combine Rows from Two Tables:

The type of join used to combine rows from two tables based on a related column is called an INNER JOIN.

Explanation:
1️⃣ An INNER JOIN returns only those rows from both tables where there is a match in the related column(s).
2️⃣ If a row in one table does not have a corresponding match in the other table, it will not appear in the result set.
3️⃣ The join is performed using a common key or related column, often a primary key in one table and a foreign key in another.

Syntax Example:

SELECT A.column1, B.column2
FROM TableA AS A
INNER JOIN TableB AS B
ON A.common_column = B.common_column;

Key Points:
• Ensures data from both tables is matched based on the related column.
• Used extensively in relational databases to retrieve meaningful combined information.
• Variations include LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN depending on whether unmatched rows are included.

Conclusion:
An INNER JOIN is the standard type of join for combining rows from two tables using a common related column, returning only matching records.