* DISTINCT [distinct] [#z19e3e64]
- 重複行を除外
-- http://www.dbonline.jp/mysql/select/index13.html
* SELECT FOR UPDATE [#acdfa38d]
- SELECT ... FOR UPDATEとロックの挙動
-- http://walf443.hatenablog.com/entry/20130829/1377788440
* [[SQL Injection>SQLInjection]] [#q6ad017c]
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