Alterna · учебный материал
Table models
Table Model Structure, hierarchical tables, table designer.
Что в этом материале
- Table structure
- Hierarchical tables
- Mini test
Содержание и основные понятия
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Alterna · Chapter 20 · page 20.2
Table models
Structure, hierarchy, designer.
The table is the most common information model, Excel, OBD, calendars, catalogues are all tables. Understanding their structure is the key to EEG No. 14 and EGE No. 3 (OBD).
GEF
PIF
OGE No. 14
EEG No. 3
01
Table structure
Heading
- the title of the table.
Header hat
- the name of the columns.
Strings
- Facilities (records).
Cells
- the properties.
Example: Classroom pupils
Last name
First name
Grade
Average
Ivanov
Ivan
10A
4.5
Petrov
Peter.
10A
4.2
Sidorova
Maria
10B
4.8
02
Hierarchical tables
The EEG No. 14 and EGE No. 3 often have tables with
hierarchy
:: Class , subclass , object.
Example: Classification of animals
Grade
Unit
Family
View
Mammals
Predatory
Cats
Lion
Mammals
Predatory
Cats
Tiger
Mammals
Predatory
Psyche
Wolf
03
Mini test
📝
6 questions by table