A user defined type ( sometimes called a record or struct ) are clumps of the other major data types stored in the same location in memory.
Procedural Programming[]
In procedural languages, types are generally just clumps of the other types. Some fields can be binary depending on language probably.
Object Oriented programming[]
In Object-Oriented programming these are more advanced in that they have associated routines with them that are used to change data so it behaves like the the original programmer intended.
| Data Type | |
| Programming | Character - Floating point Number - User-defined Type - Integer |
| Database | Character - Decimal - Integer - Blob |