Expression

Command	Description
dfr agg-groups	creates an agg_groups expression
dfr arg-where	Creates an expression that returns the arguments where expression is true.
dfr as	Creates an alias expression.
dfr col	Creates a named column expression.
dfr concat-str	Creates a concat string expression.
dfr count	creates a count expression
dfr datepart	Creates an expression for capturing the specified datepart in a column.
dfr expr-not	creates a not expression
dfr implode	Aggregates a group to a Series
dfr is-in	Creates an is-in expression.
dfr lit	Creates a literal expression.
dfr max	Creates a max expression or aggregates columns to their max value
dfr mean	Creates a mean expression for an aggregation or aggregates columns to their mean value
dfr min	Creates a min expression or aggregates columns to their min value
dfr otherwise	completes a when expression.
dfr std	Creates a std expression for an aggregation of std value from columns in a dataframe
dfr sum	Creates a sum expression for an aggregation or aggregates columns to their sum value
dfr var	Create a var expression for an aggregation
dfr when	Creates and modifies a when expression.