What is the NULL value? Is it the same as zero or a blank space?

What is the NULL value? Is it the same as zero or a blank space?

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: intellipaat, sql, topic-specific, sql, database

参考答案摘要

A NULL value represents the absence of data and is not the same as zero or a blank space. NULL means unknown or missing value Zero ( 0 ) is a numeric value Blank space ( "" ) is an empty string NULL c...

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