Generating Default Values for Nulls with Coalescing Operator. Generally speaking, developers hate nulls. While an integral part of relational database theory (where they represent an unknown value), ...

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Let’s take it one step at a time — first, the differences between inner and outer JOINs, and then the implications of NULLs on our queries. In order to ...

when NULLs appear in the data of a subquery. Scott Stephens worked for Oracle for more than 13 years in technical support, e-commerce, marketing, and software development.

As such, without nulls, missing information must be stored as a valid date/time. So, if a date/time column can be unknown, it should be defined to be nullable because null is the only viable option ...