Find the Spark self-study data set

recently, I have basically mastered the basic knowledge in self-study spark,. If you want to practice, ask for leave. Do you have any data sets to play with? Or if there are any good open source learning materials, I would like to further improve my understanding of spark.
Thank you!

Sep.16,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bee28b-31bb4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bee28b-31bb4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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