Database Management - Lecture 3 - SQL Aggregate Functions, Join
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The document outlines various SQL aggregate functions used in web development, including min, max, count, avg, and sum. It also describes how to group data with the GROUP BY clause and how to combine results from multiple tables using UNION and JOIN operations. Additionally, it touches on limiting query results with the LIMIT clause.
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- 5. MIN() and MAX() SELECT MIN(column_name) FROM table_name WHERE condition; SELECT MAX(column_name) FROM table_name WHERE condition;
- 6. COUNT(), AVG() and SUM() SELECT COUNT(column_name) FROM table_name WHERE condition; SELECT AVG(column_name) FROM table_name WHERE condition; SELECT SUM(column_name) FROM table_name WHERE condition;
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- 12. QUESTION ?
- 13. THANK YOU