结构化查询语言 em Português, tra... ... 标准通用标记语言 linguagem SGML 表格查询 consulta de tabela 参数查询 consulta parâmetro; consulta parametrizada ...
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因此，如果查询筛选字段是这种类型中的一个，而相关的表格很大，那么查询的速度会非常慢。
Therefore, if a query filter field is one of these types, and the associated table is large, the query can be very slow.
这跟在SQL查询中加入表格很相似，方法就是选择其数据应为查询结果一部分的表格。
It's almost like joining tables in an SQL query, by selecting tables whose data should be part of the results of the query.
如果表格有一定数量的片段键(或者分区键)值，而且在片段键上有同等谓词的表格上查询时，它会很有用处。
It is useful when a table has a finite set of values for the fragment key (or partitioning key) and queries on the table have an equality predicate on the fragment key.
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