What are UNION and UNION ALL in DB2? How do you differentiate between them?

What are UNION and UNION ALL in DB2? How do you differentiate between them?

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, db2, topic-specific, database

参考答案摘要

The union command is used to merge 2 or more SELECT statements and the select statements can be applied on a single table as well as on multiple tables. The major difference between UNION and UNION AL...

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