中国大学MOOC: Relational algebra consists of six basic operations: select, __________, union, set difference, cartesian product, and rename.
举一反三
- 中国大学MOOC: What is the difference between Free Trade Area and Customs Union?
- 中国大学MOOC: 六个基本视图的名称怎样标注?How the name of six basic views be marked?
- 中国大学MOOC: The Toulmin model of arguments consists of six components: claim, ground, warrant, backing, qualifier, and rebuttal. Which three components are primary?
- 中国大学MOOC: The basic unit of poetic meter in English is a ______ which normally consists of one stressed syllable plus one or two unstressed syllables.
- 中国大学MOOC: The federal union is a union of people in which ___________.