Added a Note that recommends specifying NOT NULL on the partitioning column of partitioned tables, and also nonpartitioned tables that are sources or targets for ALTER TABLE.SWITCH operations.是什么意思_Added a Note that recommends specifying NOT NULL on the partitioning column of partitioned tables, and also nonpartitioned tables that are sources or targets for ALTER TABLE.SWITCH operations.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句