java - 如何在java中组合（连接）两个具有相同列名的数据帧

How can I combine(concatenate) two data frames with the same column name in java

提问by Seena V P

Can I append a dataframe to the right of other dataframe having same column names

我可以在具有相同列名的其他数据框的右侧附加一个数据框吗

采纳答案by Shankar

You can join two dataframes like this.

您可以像这样连接两个数据框。

df1.join(df2, df1.col("column").equalTo(df2("column")));

If you are looking for Union, then you can do something like this.

如果你正在寻找 Union，那么你可以做这样的事情。

df1.unionAll(df2);  // spark 1.6

Spark 2.0, unionAllwas renamed to union

Spark 2.0，unionAll更名为union