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Dear All, These are my answers from Quora and primarily Google; please check the answer and from others sites; the answers are free and without any liability.To make a decision, write down all of the positives and negatives on a piece of paper.Thank you,

Elias Katsaniotis, MSc


Viktoria Katsanioti,




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How do I prevent duplication data uploaded to MySQL database from a CSV or Excel file upload?
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you may

  1. use unique keys
  2. before insert triggers in the MySQL
  3. write a program, maybe PHP, to perform Pre-Insert tasks
  4. maybe more

In one migration project from a Tailored Oracle Accounting System to SAP, I had done the insert using PRO*C programs for the export (where there were possible checks) and the Impor Utility of SAP).

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