relational language

基本解釋

In a relational language, such a query would require a join that might span several data tables and system catalog tables.
而在關(guān)系語(yǔ)言中，這種查詢(xún)需要進(jìn)行也許跨越了多個(gè)數(shù)據(jù)表和系統(tǒng)目錄表的聯(lián)接。
The result is likely to be a language with a more complex semantic definition than that of a relational language such as SQL.
其結(jié)果很可能產(chǎn)生其語(yǔ)義定義比關(guān)系語(yǔ)言（如 SQL）更加復(fù)雜的一門(mén)語(yǔ)言。
It also requires a query language to provide constructors that are capable of creating complex nested structures on the fly -- a facility that is not needed in a relational language.
這也需要一種查詢(xún)語(yǔ)言來(lái)提供可動(dòng)態(tài)創(chuàng)建復(fù)雜嵌套結(jié)構(gòu)的構(gòu)造函數(shù)，而該工具在關(guān)系語(yǔ)言中是不需要的。

This traditional database platforms, known as relational database management systems (RDBMS) all use a language called SQL (structured query language).
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