What is the difference between SQL JOIN and UNION?
An example of an AI chatbot conversation about SQL JOIN and UNION differences.
What is the difference between SQL JOIN and UNION?
SQL JOIN combines rows from two or more tables based on a related column, while UNION combines the results of two or more SELECT queries.
Can you give me an example of how to use JOIN?
Sure! If you have a 'Customers' table and an 'Orders' table, you can use JOIN to get customer names along with their orders.
And what about UNION? How does that work?
UNION is used to combine the results of two SELECT statements. For example, if you have two tables with similar structures, you can use UNION to get a combined list.
Are there any differences in performance between JOIN and UNION?
Yes, JOINs can be more efficient when you need related data from multiple tables, while UNION may require more processing if the datasets are large.
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