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📜  数据库中的 NULL 值是否与空格相同或为零? - SQL 代码示例

📅  最后修改于: 2022-03-11 15:05:08.584000             🧑  作者: Mango

代码示例1
No, its diffrent 
0 - Represents something that is assigned 0
NULL - Represents UNKNOWN,
blank_space - Represents character