Can String be converted to set in redis?

how do I convert the original string type to the set type?

Mar.04,2021

cannot be converted directly and needs to be read and written by the program. You can use redis pipeline to reduce RTT, reduce the number of IO calls, and improve performance.

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-64f5-1b3cf55-2b8a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3cf55-2b8a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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