If the same row is updated again within the same commit scope, then no record is created in the history table.
如果在相同事务范围内再次更新相同行,那么不会在历史表创建记录。
As old and new players compete to lead the industrial trend, the ranking of popular exhibitors will be updated again in this issue of news letter.
最受买家欢迎展商排名座次本期更新,看新老势力共同引领行业坐标。
If a row has already been updated or deleted, then this row cannot be joined again with any source table row for another update or delete again.
如果一个行已被更新或者删除,那么不能针对该行再次更新与删除,再次与任何源表联接。
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