MAX function [Aggregate]

Returns the maximum expression value found in each group of rows.

Syntax 1
MAX( expression | DISTINCT expression )
Parameters
  • expression   The expression for which the maximum value is to be calculated. This is commonly a column name.

  • DISTINCT expression   Returns the same as MAX( expression ), and is included for completeness.

Returns

The same data type as the argument.

Remarks

Rows where expression is NULL are ignored. Returns NULL for a group containing no rows.

See also
Standards and compatibility
  • SQL/2003   Core feature.

Example

The following statement returns the value 138948.000, representing the maximum salary in the Employees table.

SELECT MAX( Salary )
FROM Employees;