Large power transformer is one of the most important and expensive equipment in the power system, its operation statements has a direct impact on the power system security.
大型电力变压器是电力系统最重要和最昂贵的设备之一,其运行状态直接影响系统的安全性。
These statements perform a single operation — hence, they're called simple.
这些语句执行一个简单的操作,因此把它们叫做简单语句。
Since those triggered actions are typically one or more insert, UPDATE, or DELETE statements, the overhead of triggers can be substantial in a mass insert operation.
由于那些被触发的动作通常是一条或多条insert、UPDATE或delete语句,因此,在数据量很大的insert中,触发器的开销会很大。
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