Final answer:
In SQL, using the DISTINCT keyword with the MAX function is redundant because MAX already returns the single highest value, regardless of duplicates. The DISTINCT keyword is intended to remove duplicate records, which doesn't serve a purpose when using aggregate functions like MAX.
Step-by-step explanation:
The question pertains to the use of SQL commands, specifically whether the DISTINCT keyword can be used with the MAX function. In SQL, the DISTINCT keyword is used to eliminate duplicate records from the results of a SELECT query. On the other hand, the MAX function is used to find the maximum value in a specified column.
When used with aggregate functions, such as MAX, the DISTINCT keyword has no practical effect because aggregate functions inherently return a single result from a set of values, even if there are duplicates in the set. Using DISTINCT with MAX will not result in an error, but it is redundant and unnecessary. Therefore, there is no benefit to combining DISTINCT with MAX, as MAX will always return the single highest value found in the specified column, making the elimination of duplicates irrelevant.