What will happen if we try inserting two nulls in a column having a unique constraint on it?
What will happen if we try inserting two nulls in a column having a unique constraint on it?
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, data-modelling, topic-specific
参考答案摘要
Since a null value is not equal to another null value, inserting two null values on a column with a unique constraint does not throw any error. It simply inserts the data.
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