Answer: 4) Hierarchy
Explanation:
The main components of the relational database are table, entity and attributes. As, relational data base is the method of arranging and maintaining the data and each table in the database contain data in the entity and the attributes. Hierarchy is not the component of the database as it is included in the type oh hierarchical database not in relational database.
Answer.
The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association.
Explanation:
Answer:
I remember before the corona virus we used to do math at school
I would say this is true as syntax means the arrangement of words or phrases and grammar and spelling are part of this ie grammar is the system and structure of a language such as that a sentence must have a subject and a verb or that tenses must agree or that plural nouns must consistently be treated as plural and that words are spelled correctly to give the correct meaning, as examples.