Can we use Max on a column?

Can we use Max on a char column?

YES.

How do I find the maximum value in a column in SQL?

To find the max value of a column, use the MAX() aggregate function; it takes as its argument the name of the column for which you want to find the maximum value. If you have not specified any other columns in the SELECT clause, the maximum will be calculated for all records in the table.

Can you use Max on a string?

The MAX() aggregate function can also take a constant value or any arithmetic or string expression, taking into consideration that the MAX() aggregate function will ignore any NULL value in the input expression.

Can we use max with where?

MAX() function with Having The usage of WHERE clause along with SQL MAX() have also described in this page. The SQL IN OPERATOR which checks a value within a set of values and retrieve the rows from the table can also be used with MAX function.