MySQL MAX() function
MySQL MAX() function returns the maximum value of an expression.
This function is useful in -
- To identify the highest value within a column is crucial for understanding the upper limit of a dataset.
- When analyzing data, you might want to know the highest or peak value in a certain attribute.
- The MAX() function helps evaluate the highest performance metrics, such as maximum revenue, profits, or user engagement.
- Identifying the maximum value helps in assessing whether a process is operating within acceptable limits.
- When comparing performance against benchmarks, the MAX() function assists in determining how close or far data is from the best achieved results.
- In e-commerce or inventory management, determining the maximum order quantity helps in fulfilling customer demands efficiently.
- For critical decisions, knowing the maximum value in relevant data attributes can provide insights for strategic planning.
Where expr is an expression.
MySQL Version: 8.0
Sample table: book_mast
SELECT MAX(book_price) FROM book_mast;
Relational Algebra Expression:
Relational Algebra Tree:
The above MySQL statement will return the maximum 'book_price' from 'book_mast' table.
mysql> SELECT MAX(book_price) -> FROM book_mast; +-----------------+ | MAX(book_price) | +-----------------+ | 250.00 | +-----------------+ 1 row in set (0.00 sec)
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