Expression

Command	Description
polars arg-where	Creates an expression that returns the arguments where expression is true.
polars as	Creates an alias expression.
polars col	Creates a named column expression.
polars concat-str	Creates a concat string expression.
polars datepart	Creates an expression for capturing the specified datepart in a column.
polars is-in	Creates an is-in expression or checks to see if the elements are contained in the right series
polars lit	Creates a literal expression.
polars otherwise	Completes a when expression.
polars when	Creates and modifies a when expression.