我正在使用Spark,我想知道如何获得top标签的倒排索引?
sqlDF = spark.sql("SELECT * FROM Users")
sqlDF.show(
+--------+--------------------+--------------------+----------+
| id| title| tags|closeddate|
+--------+--------------------+--------------------+----------+
|48704243|Transfer files fr...|<java><android><f...| null|