9	Tokyo
27	Singapore
-5	Seoul
7	Shanghai

• [F] export_from_database_via_pdo.php
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• [F] import_from_database_via_pdo.php
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• [F] insert-or-update-user-for-mysql.php
  Delete
• [F] sample.php
  Delete
• [F] temperature.tsv
  Delete
• [F] tsv-sample.php
  Delete
• [F] user.csv
  Delete