In the pessimistic locking scheme, explicit locks are taken against rows using the SQL SELECT FOR UPDATE statement. Data is then modified, and an SQL UPDATE is issued.
在悲观锁定方案中，通过使用SQLSELECTFORupdate语句对数据行进行显式锁定，然后更改数据，并执行SQL UPDATE。
In the pessimistic locking scheme, explicit locks are taken against rows using the SQL SELECT FOR UPDATE statement. Data is then modified, and an SQL UPDATE is issued.
在悲观锁定方案中，通过使用SQLSELECTFORupdate语句对数据行进行显式锁定，然后更改数据，并执行SQL UPDATE。
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