@techreport{weko_20741_1,
   author	 = "芝野,耕司",
   title	 = "データベース言語SQL",
   year 	 = "1987",
   institution	 = "日本アイ・ビー・エム株式会社東京基礎研究所",
   number	 = "28(1987-DBS-059)",
   month	 = "may"
}