决定服务器锁锁定数据库的锁方案。
Locking scheme that determines which server locks which database.
在这种情况下，锁定数据库记录有优点也有缺点。
Having the database records locked in this case is a good thing and a bad thing.
根据研究需要进行数据清洗，获得804例患者的临床信息，锁定数据库。
Data were screened according to the requirements of the study, finally the clinical information of 804 cases was selected, and then the database was locked.
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