What are the SQL set operations and how do I use them?
An example of an AI chatbot conversation about SQL set operations and their syntax.
What are the SQL set operations and how do I use them?
SQL set operations include UNION, INTERSECT, and EXCEPT. They allow you to combine results from multiple queries.
Can you give me an example of using UNION?
Sure! The UNION operation combines the results of two SELECT statements. For example: SELECT column_name FROM table1 UNION SELECT column_name FROM table2;.
What about INTERSECT? How does it work?
INTERSECT returns only the rows that are common to both SELECT statements. For example: SELECT column_name FROM table1 INTERSECT SELECT column_name FROM table2;.
Are there any limitations to using these operations?
Yes, all SELECT statements must have the same number of columns and compatible data types for set operations to work.
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