Stable release | 2.0
/ 30 October 2008 |
---|---|
Influenced by | |
SQL |
Astronomical Data Query Language (ADQL) is a language for astronomical data query based on SQL 92. [1]
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 dedigned to handle large datasets distributed over several locations, [4] while not retrieving data that is not needed. [5]
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]
ADQL is implemented in packages such as TOPCAT. [6]
SELECT source_id, ra, dec
FROM gaiadr1.tgas_source
WHERE phot_g_mean_flux > 13
Stable release | 2.0
/ 30 October 2008 |
---|---|
Influenced by | |
SQL |
Astronomical Data Query Language (ADQL) is a language for astronomical data query based on SQL 92. [1]
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 dedigned to handle large datasets distributed over several locations, [4] while not retrieving data that is not needed. [5]
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]
ADQL is implemented in packages such as TOPCAT. [6]
SELECT source_id, ra, dec
FROM gaiadr1.tgas_source
WHERE phot_g_mean_flux > 13