Parses the expression string into the column that it represents, similar to [[DataFrame#selectExpr]].
{{{ // get the number of words of each length df.groupBy(expr("length(word)")).count() }}}
Parses the expression string into the column that it represents, similar to [[DataFrame#selectExpr]].
{{{ // get the number of words of each length df.groupBy(expr("length(word)")).count() }}}