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Why does WHERE email = NULL return zero rows?
Why does WHERE email = NULL return zero rows — even when half your users actually have a NULL email? NULL doesn't mean empty string. NULL means unknown. In SQL's three-valued logic, NULL = NULL is itself UNKNOWN, and the WHERE clause treats UNKNOWN like FALSE. Every row's filter check fails — even the rows where email really was NULL. The ...
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Python Object-Oriented Programming | I had experience with OOP prior to learning python when I was using Java. So when It came to learning python, not only were the syntax much easier than Java, but both languages all share a major similarity with each other: they both support OOP. My experience with Java made learning Python much easier because I was already familiar with the core principles of OOP. Here is more info on OOP if you’re interested: Object-Oriented Programming (OOP) in Python is a
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Python Object-Oriented Programming | I had experience with OOP prior to learning python when I was using Java. So when It came to learning python, not only were the syntax much easier than Java, but both languages all share a major similarity with each other: they both support OOP. My experience with Java made learning Python much easier because I was already familiar with the core principles of OOP. Here is more info on OOP if you’re interested: Object-Oriented Programming (OOP) in Python is a
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