Since the set of object instance methods on pandas data structures are generally rich and expressive, we often simply want to invoke, say, a DataFrame function on each group. The name GroupBy should be quite familiar to those who have used a SQL-based tool (oritertools), in which you can...
I know it is not a problem per se but I think there should be some pandas built in solution for this problem, as no simple function exists for this. It is largely discussed here with various ideas (https://stackoverflow.com/questions/12680754/split-pandas-dataframe-string-entry-to-separate...
SQL 在SQL Server中将包含逗号分隔值的列拆分为多行 在本文中,我们将介绍如何在SQL Server中将包含逗号分隔值的列拆分为多行。在许多情况下,数据库表中的某列包含以逗号分隔的多个值。这种情况下,我们可能需要将这些值拆分成多行,以便能够更好地进行查询和分析。 阅读