DESCRIBE [VERBOSE] ( [ DISTINCT | ALL ] 'value_expression' )
- Includes both fully parallel and single-threaded functions.
- All non-null value_expressions, including duplicates, in the computation.
- Excludes duplicates specified by value_expression from the computation.
- A literal or column expression for which a set of aggregate functions are computed for the series.
The value_expression cannot be a reference to a view column derived from a function, and cannot contain any ordered analytical or aggregate functions.