您可以使用where
或filter
函数来实现此目的,如下所示:-
df.filter($"age" > 15)
df.where($"age" > 15)
更新以按列索引删除
val col = df.columns
val n = df.columns.length
val toBeDropped = n-1 // to drop last column and so on..
val oldDf = df.drop(col(ToBeDropped ))
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