How to Join the Same Table Twice in MySQL?

How to Perform Multiple Join Operations on the Same Table in MySQL

When working with multiple tables, it may be necessary to join them on multiple instances of the same table. In MySQL, this can be achieved using multiple LEFT JOIN statements.

Consider the following scenario: you have two tables, "domains" and "reviews," with the following columns:

• domains: dom_id, dom_url
• reviews: rev_id, rev_dom_from, rev_dom_for

To display both domain names (from the "domains" table) associated with each review, you would need to perform two LEFT JOINs on the "domains" table. Here's how the query would look:

By aliasing the second "domains" table as "toD" and "fromD," you can specify which column to join on and which domain name to retrieve. In the SELECT list, you can then reference the desired domain names using the appropriate table aliases.

In summary, to join on the same table twice in MySQL, simply use multiple LEFT JOIN statements with different table aliases. This allows you to access multiple columns from the same table within a single query.

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