Entity–attribute–value model
Type of space-efficient data model
An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design. The use-case targets applications which offer a large or rich system of defined property types, which are in turn appropriate to a wide set of entities, but where typically only a small, specific selection of these are instantiated (or persisted) for a given entity...
Nº Q5380560 ★★
Uncommon · Knowledge
Entity–attribute–value model
Type of space-efficient data model
An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design. The use-case targets applications which offer a large or rich system of defined property types, which are in turn appropriate to a wide set of entities, but where typically only a small, specific selection of these are instantiated (or persisted) for a given entity...
Last price
—
Floor price
—
7-day median
—
30-day sales
0
30-day range
—
In circulation
0
Price history
median
low – high
sales
No sales in this period
Show table
| Date | median | Low | High | sales |
|---|
Sales history
- Last sale
- —
- 30-day average
- —
- 30-day low
- —
- 30-day high
- —
- Sales 7d
- 0
- Sales 30d
- 0
No sales yet.
Anonymous sales: no buyer or seller shown. Figures count player-to-player sales only.
From Wikipedia
An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design. The use-case targets applications which offer a large or rich system of defined property types, which are in turn appropriate to a wide set of entities, but where typically only a small, specific selection of these are instantiated (or persisted) for a given entity. Therefore, this type of data model relates to the mathematical notion of a sparse matrix. EAV is also known as object–attribute–value model, vertical database model, and open schema.
Text: Wikipédia, CC BY-SA 4.0. ·
Related cards
-
E
Eigenvalue
For a linear map, the scale factor when the map is applied to a particular eigenvector
Nº Q3553768 ★
Not listed
-
Data vault modeling
Database modelling method with long-term historical storage that enables tracking of values and load dates back to their sources for auditing
Nº Q3318159 ★
Not listed
-
Eigenvalues and eigenvectors
Vectors that map to their scalar multiples, and the associated scalars
Nº Q190524 ★★★
Not listed
-
Data model
An abstract model that organizes elements of data and standardizes how they relate to one another and to real world entities.
Nº Q1172480 ★★
Not listed
-
A
Automated valuation model
Nº Q4826487 ★
Not listed
-
Entity component system
Software architectural pattern used in video game development, with entities composed from components of data, and with systems which operate on entities' components
Nº Q17089065 ★★★
Not listed