如何使用ADQL将行连接成单行

Question

如何使用ADQL (天文数据查询语言)将多行连接成一行？

我想做的是，选择一个对象的所有可选名称，并像这样将它们连接起来：

M 13
Hercules cluster

至

M 13, Hercules cluster

我现在在SIMBAD上使用的查询(返回同一对象的多行，每行对应一个备用名称)：

-- Basic data from an object given one of its identifiers.
SELECT basic.OID,
       RA,
       DEC,
       main_id AS "Name",
       OTYPEDEF.otype_longname AS "Type",
       OTYPEDEF.otype_shortname AS "TypeShort",
       coo_bibcode AS "Coord Reference",
       nbref AS "NbReferences",
       plx_value as "Parallax",
       rvz_radvel as "Radial velocity",
       galdim_majaxis,
       galdim_minaxis,
       galdim_angle AS "Galaxy ellipse angle",
       id1.id
FROM basic JOIN ident ON ident.oidref = oid
LEFT JOIN OTYPEDEF ON OTYPEDEF.otype = basic.otype
LEFT JOIN ident AS id1 ON id1.oidref = basic.OID
WHERE ident.id = 'M13'

在这里试试：http://simbad.u-strasbg.fr/simbad/sim-tap

Answer 1

弄清楚了：

原来只能使用列名的复数形式：

SELECT  TOP 100  "public".ids.ids
FROM "public".basic
JOIN "public".ids ON "public".basic.oid = "public".ids.oidref
WHERE      "public".basic.main_id = 'm13'