Comparison functions always return 0 or 1 (Uint8).
The following types can be compared:
- strings and fixed strings
- dates with times
within each group, but not between different groups.
For example, you can’t compare a date with a string. You have to use a function to convert the string to a date, or vice versa.
Strings are compared by bytes. A shorter string is smaller than all strings that start with it and that contain at least one more character.