Querying using XQuery on a XML column of an indexed table.
使用XQuery查询索引表的xml列。
The processing procedures are introduced, and the method of using dual indexed table is presented.
介绍了报警事件的处理过程，阐述了双索引表的使用方法。
This means that an exclusive lock is always placed on the indexed table while a functional index is being created or dropped.
这说明，在创建或删除函数索引时，执行索引的表中始终持有一个排他锁。
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