Astronomical Data Query Language
| Astronomical Data Query Language | |
|---|---|
| Stable release | 2.0
/ 30 October 2008 |
| Website | {{ |
| Influenced by | |
| SQL | |
Astronomical Data Query Language (ADQL) is a language for astronomical data query based on SQL 92.[1]
Overview
[edit | edit source]ADQL is a specialized variant of the SQL query language adapted for accessing the astronomical datasets of the virtual observatory,[2] via the Table access protocol (TAP).[3] ADQL is designed to handle large datasets distributed over several locations,[4] while not retrieving data that is not needed.[5]
Language
[edit | edit source]ADQL is a query language that allows data to be retrieved via a single command, the select statement, which is designed to perform as the select statement in the SQL language.[2] ADQL has extensions designed to improve handling of astronomical data such as spherical co-ordinates that are not handled by standard SQL.[2]
Implementations
[edit | edit source]ADQL is implemented in packages such as TOPCAT.[6]
Example
[edit | edit source]SELECT source_id, ra, dec
FROM gaiadr1.tgas_source
WHERE phot_g_mean_flux > 13
References
[edit | edit source]Footnotes
[edit | edit source]- ^ Osuna & Ortiz 2008, Abstract.
- ^ a b c Gaia 2021.
- ^ Minin & Rossi 2020, p. 39.
- ^ Demleitner & Heinl 2019, p. 1.
- ^ Heinl & Jordan 2017, 2m.
- ^ Pössel 2020, p. 28.
Sources
[edit | edit source]- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
