"All tortoises are turtles, but not all turtles are tortoises," Sydnee Fenn, a reptile keeper at Columbus Zoo and Aquarium, told Live Science. Generally, the reptiles that people call turtles spend a ...

This article will use SQL Server and PostgreSQL as examples to delve into the differences in their VARCHAR implementations and explain the usage rules of the 'N' prefix. Differences between VARCHAR in ...