Write queries to declare the primary key and foreign key for some table?

Write queries to declare the primary key and foreign key for some table?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: easy

标签: interviewbit, tcs-digital, company-specific

目标公司: Tata Consultancy Services

参考答案摘要

A primary key is a column or set of columns (combined primary key) in a database table that uniquely identifies each record in the table. The primary key must be unique and not null, meaning it cannot...

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