What makes a Union clause different from a Join clause?

What makes a Union clause different from a Join clause?

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: hard

标签: interviewbit, sql-joins, topic-specific, sql, database

参考答案摘要

To combine data from two or more tables, you may use joins and UNIONS in your queries. Join: Essentially, joins allow you to combine data into new columns horizontally. A join clause is an SQL command...

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