| ประโยคภาษาจีน : 中文句子 | 
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|  yǔ jù语句  duì对  hēi kè黑客  yóu qí尤其  yǒu yòng有用  yīn wèi因为  hēi kè黑客  kě yǐ tōng guò可以通过  tā它  jiāng将  yí gè一个  chá xún查询  de的  jiē guǒ结果  jiē hé接合  dào到  lìng yī另一  chá xún查询  jiē guǒ结果  shàng上 | 
| The UNION statement in particular is useful to a hacker because it allows him to splice the results of one query onto another. |