The query above contains a correlated subquery, since the main query and the subquery are relaying on the same table, the employees table.
以上查询包含一个相关子查询，因为主查询和子查询依靠于同一个表，即employees表。
A visible calculation and management system for generator's internal faults and main protective relaying setting is developed.
介绍了一套可视化的发电机内部故障计算和主保护整定管理系统。
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