What is the difference between **UNION** and **UNION ALL
What is the difference between **UNION** and **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: medium
标签: intellipaat, sql, topic-specific, sql, database
参考答案摘要
UNION removes duplicate records, whereas UNION ALL includes all records, including duplicates. | Feature | UNION | UNION ALL | | --- | --- | --- | | Duplicate Rows | Removed | Included | | Performance...
答题技巧
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