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 ...
答题技巧
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