How UNION is different from UNION all?

How UNION is different from UNION all?

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, jp-morgan, company-specific

目标公司: JPMorgan Chase

参考答案摘要

Union is an SQL command and it is used to join two or more sets into a single set. Two queries can be combined easily into a single result set using the select statements. Syntax: Query1 UNION Query2 ...

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