ClickHouse是俄罗斯的Yandex于2016年开源的列式存储数据库(DBMS),使用C++语言编写,主要用于在线分析处理查询(OLAP),能够使用SQL查询实时生成分析数据报告。 OLAP(On-Line Analytical Processing)翻译为联机分析处理,专注于分析处理,从对数据库操作来看,OLAP是对数据的查询; OLTP(on-line transaction processing)翻译为联机...
In mathematics, the sense of peculiarity is compounded by the common practice of using the term ‘implication’ instead of ‘conditional’, equating ‘if A then B’ with ‘A implies B’. This terminology has a distinguished history: Russell and Whitehead (1910) used ‘material implication’ rat...
This configuration allows an administrator to restrict a dial-peer to either allow inbound connections only (term / terminate) or egress connections (orig / originate). This would be like explicitly configuring an inbound dial-peer to only be used for inbound calls and an outbou...
(for our own long term usage validation) and a migration (to integrate into theirs) and otherwise competent users who were big experts in their own field of data analysis often could not handle the technicalities of multiple/nested logins or the logistical fallout from having their initial login...
NIL is a special data type indicating an unassigned or default value. The NIL data type has only one possible value, also called NIL. Any variable that is named but has not had a value assigned to it has a data type NIL. The term NIL is also used to indicate a NIL constant, e.g...
According to the iterative algorithm, by solving the RTE with an arbitrary temperature field, div(qr) is obtained and then it is substituted in the energy equation as source term and the new temperature field is obtained. By using this new temperature field, another time the RTE is ...
But that doesn't mean thatsomeusage patterns of reifiers will be intentionally limited to one triple term (proposition). In fact, the<< s p o >>syntax appears to deliberately cater for that. (And as we've discussed before, one might use OWL restrictions onrdf:reifiesas a way to forma...
Understanding how exactly cron works isn't really necessary to understand the comic and its humor. Perhaps linking to some "cron for dummies" tutorial for those interested141.101.91.223 04:03, 3 September 2016 (UTC) What exactly does "hardball" mean? Is it a US slang term or such?141.101...
When the target is absent from the sentence, this is called a dangling modifier. When the target is not in the correct placed, the modifier is then describing or changing a different word, and the intended target is left alone. This is called a misplaced modifier. Let's look at some ...
Steps [1]-[6] are sometimes grouped under the term 'Parsing' Step [7] is the execution of the statement. The explain plan a representation of the access path produced in step 6. Once the access path has been decided upon it is stored in the library cache ...