What are the different types of SQL joins and how do they compare?
An example of an AI chatbot conversation about comparing SQL join types.
Can you explain the different types of SQL joins?
Sure! The main types of SQL joins are INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN. Would you like a brief description of each?
Yes, please! What’s the difference between INNER JOIN and LEFT JOIN?
INNER JOIN returns only the rows that have matching values in both tables, while LEFT JOIN returns all rows from the left table and the matched rows from the right table. If there's no match, NULLs are returned for columns from the right table.
Got it! What about RIGHT JOIN and FULL OUTER JOIN?
RIGHT JOIN is similar to LEFT JOIN but returns all rows from the right table and matched rows from the left. FULL OUTER JOIN returns all rows when there is a match in either left or right table, filling in NULLs where there are no matches.
Thanks! Can you give me an example of when to use each type?
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