Boost your SQL interview readiness with these 35 carefully selected SQL Interview Questions and Answers. Includes real-world ...

The big picture: Having the last name "Null" is apparently the modern equivalent of being cursed. Just ask the Nulls who endure a never-ending loop of website errors, processing failures, and customer ...

Nontra Yantaprasert couldn’t wait to take her husband’s shorter and easier-to-pronounce last name. She didn’t know what kinds of problems it would cause. His last name is Null, the same word used by ...

在实时数据开发过程中，大家经常会用 Flink SQL 或者 Flink DataStream API 来做数据加工。通常情况下选用2者都能加工出想要的数据，但是总会有 Flink SQL 覆盖不了的问题，但 SQL 的易用性又难以让人释怀。所以有些场景在使用 FLink SQL 开始就与需要额外注意，下面就 ...

Abstract: The lack of information within relational databases expressed as NULL values presents a problem in ensuring the quality of data and the information retrieved by SQL queries. This is so ...

Null pointer exceptions are no fun. You can avoid them and keep your code clean and maintainable by using these techniques to elegantly handle null values in C#. When working on applications in any ...

从上述结果可以看出，count(*)和count(name)的值不一样，即当使用的是 count(name) 查询时，就丢失了两条值为 NULL 的数据。 解决 ...