Backup diff of SQL vs current(No. 2)

• Backup list
• View the diff.
• View the diff current.
• View the source.
• View the backup.
• Go to SQL.

• SEQUEL (SQLの前身)

• SQL Injection

DISTINCT [distinct]

• 重複行を除外
  • http://www.dbonline.jp/mysql/select/index13.html

SELECT FOR UPDATE

• SELECT ... FOR UPDATEとロックの挙動
  • http://walf443.hatenablog.com/entry/20130829/1377788440

• SQLの悪い点/不便な点
  • https://zenn.dev/todesking/scraps/cbf5753f2e7c13