Why would a reverse index be useful when the leading column of the index is generated from a sequence?
当索引第一列由序列产生，一个逆序索引有什么用？
Depending on the kinds of LIKE queries you need to do, you may be able to use the reverse index technique to narrow the search space.
根据各种一样，你需要做的查询，您可以使用反向索引技术来缩小搜索空间。
A global reverse index is simply a design where you create a map whose key is the search term, and the value is the list of keys containing an attribute with that search term.
一个全局反向索引仅仅是一个设计，其中创建的映射的键是搜索关键词，且其值是包含属性与搜索关键词的键列表。
A final case, which should only be considered when a reverse index cannot be applied for some reason or complicates your design, is to use ObjectGrid queries to locate your data.
最后一种情况是使用ObjectGrid查询，仅当处于某种原因不能应用反向索引或应用它会使设计更复杂时，才考虑使用这种查询。
then DB2 could use the four-column index the "traditional" way (index, table, index, table, etc.) to return the rows in the desired order (the same order as or the reverse order of the index).
然后，DB2可以以 “传统”方法（索引、表、索引、表，等等）使用这个 “4列” 索引以期望的次序（与索引相同或相反的顺序）返回所需行。
Based on principle of reverse osmosis and used microcomputer 89c52 as controller, an automatic detection instrument of sludge density index (SDI) of water pollution is designed.
基于反渗透原理，以89c52单片机为控制器，设计了水污染指数中的淤积密度指数(SDI)的自动在线测试装置。
Sludge density index (SDI) of effluent treated by improved formula is below 5.0, and it would meet the quality requirement of the influent of following reverse osmosis unit.
经改进配方，处理的排污水的污泥密度指数(SDI)小于5.0，能够满足后续反渗透单元的进水要求。
Its main role is to reduce the raw water pollution index, and residual chlorine and other impurities, to reverse osmosis water requirements.
其主要作用是降低原水的污染指数和余氯等其他杂质，达到反渗透的进水要求。
Reverse dispersion fiber (RDF) with depressed-core index profile is fabricated successfully by using plasma-activated chemical vapor phase deposition.
利用非等温等离子体化学气相沉积成功制得了具有折射率中心下陷的负色散光纤(rdf)。
Reverse dispersion fiber (RDF) with depressed-core index profile is fabricated successfully by using plasma-activated chemical vapor phase deposition.
利用非等温等离子体化学气相沉积成功制得了具有折射率中心下陷的负色散光纤(rdf)。
应用推荐